Use the A-Z list to browse more than 6,000 health-related topics in our library. Clicking on a term opens the definition and, in most cases, links to more information.
Also Known As: "American Dental Association Seal Of Acceptance, ADA Seal"
A designation by the American Dental Association that a product has met its standards for safety and effectiveness. The seal may appear on toothbrushes, floss, toothpaste, mouthwash, implants, fillings and other consumer or professional products.
Also Known As: "American Dental Association Seal Of Acceptance, ADA Accepted"
A designation by the American Dental Association that a product has met its standards for safety and effectiveness. The seal may appear on toothbrushes, floss, toothpaste, mouthwash, implants, fillings and other consumer or professional products.
Also Known As: "ADA Accepted, American Dental Association Seal Of Acceptance, ADA Seal"
A designation by the American Dental Association that a product has met its standards for safety and effectiveness. The seal may appear on toothbrushes, floss, toothpaste, mouthwash, implants, fillings and other consumer or professional products.
"ADAA" is more commonly referred to as "Anxiety Disorders Association of America" in the medical community. Anxiety Disorders Association of America
A nonprofit organization for the prevention, treatment and cure of anxiety disorders and the improvement of the quality of life of the people who suffer from them.
"Adalat" is more commonly referred to as "Procardia" in the medical community. Procardia
A brand name of a calcium channel blocker, medications that block the movement of calcium ions into heart cells and blood vessels. This increases the supply of oxygen-rich blood to the heart, lowers blood pressure and reduces the heart's workload. More Information on Procardia: Heart Drug & Medication
A rare type of multiple congenital anomaly/mental retardation (MCA/MR) syndrome that primarily affects the scalp and cranium. It may include one or more birth defects of the heart, such as tetralogy of Fallot and pulmonary atresia. More Information on Adams Oliver Syndrome: Pediatric Heart
"Adams Stokes Disease" is more commonly referred to as "Stokes Adams Disease" in the medical community. Stokes Adams Disease
Also Known As: "Morgangni"
An interruption in the path of electrical impulses from the atria to the ventricles, creating a lack of communication regarding the heartbeat (a heart block). Causes an abnormally slow heartbeat and even fainting from lack of oxygen to the brain. More Information on Stokes Adams Disease: Arrhythmia
"ADD" is more commonly referred to as "Attention Deficit Hyperactivity Disorder" in the medical community. Attention Deficit Hyperactivity Disorder
Also Known As: "Attention Deficit Disorder, ADHD, Attention Deficit Hyperactive Disorder"
A neurological disorder characterized by inattentiveness, inability to concentrate, impulsiveness and hyperactivity often accompanied by restlessness, disorganization and mood swings. More Information on Attention Deficit Hyperactivity Disorder: Attention & Learning Disorders
Medications used to treat attention deficit hyperactivity disorder (ADHD). While many may have a stimulating effect in most people, they have a calming affect in ADHD patients. These include methylphenidate and dextroamphetamine, among others. More Information on ADD Drugs: Attention & Learning Disorders
Medications used to treat attention deficit hyperactivity disorder (ADHD). While many may have a stimulating effect in most people, they have a calming affect in ADHD patients. These include methylphenidate and dextroamphetamine, among others. More Information on ADD Medications: Attention & Learning Disorders
An emotional and/or psychological dependence on a substance, such as a drug or alcohol, regardless of potential or actual harm. Sometimes extended to refer to any irrational repetitive compulsion, such as gambling or eating. More Information on Addiction: Alcohol & Substance Abuse
A rare disease in which the adrenal glands do not produce enough steroid hormones. This may lead to a brownish pigment to the skin, weakness, low blood pressure, gastrointestinal problems and other symptoms. It may be linked to type 1 diabetes. More Information on Addison Disease: Diabetes & Endocrine Basics
Reaction to any substance, either natural or man-made, that is added to a food other than its basic raw ingredients. These may include preservatives, artificial sweeteners, artificial coloring or flavors and more. More Information on Additive Allergies: Food Allergy & Intolerance
Reaction to any substance, either natural or man-made, that is added to a food other than its basic raw ingredients. These may include preservatives, artificial sweeteners, artificial coloring or flavors and more. More Information on Additive Sensitivities: Food Allergy & Intolerance
Any substance, either natural or man-made, that is added to a food other than its basic raw ingredients. These may include preservatives, artificial sweeteners, artificial coloring or flavors and more. More Information on Additives: Additives & Seasonings
In medicine, a term to describe any motion of a body part toward the center of the body. This action (adduction) is achieved through an adductor muscle.
"ADEM" is more commonly referred to as "Acute Disseminated Encephalomyelitis" in the medical community. Acute Disseminated Encephalomyelitis
Also Known As: "Postinfectious Encephalomyelitis, Immune Mediated Encephalomyelitis"
A condition in which the brain and spinal cord become suddenly inflamed, causing damage. It usually occurs after a viral infection, but can also occur after certain immunizations. More Information on Acute Disseminated Encephalomyelitis: Brain Related Infections
Also Known As: "Glandular Cancer, Glandular Sarcoma, Glandular Carcinoma"
Cancer that develops within certain glandular cells. Glands are organs that secrete hormones. Locations of gland tumors include the breasts, prostate, pancreas, bladder and others. More Information on Adenocarcinoma: Cancer Basics
A brand of antiarrhythmics, medications used to treat all types of irregular heart rhythms (arrhythmias) except an abnormally slow heartbeat. Some act directly on the heart to slow it down, and others act to restore a normal beating pattern. More Information on Adenocard: Heart Drug & Medication
Lymphoid tissue located in the upper portion of the throat, behind the nose. Along with the tonsils, it is believed to help fight off infection, especially during the first year of life.
A rare type of cancer that usually begins in the salivary glands and often spreads to the breast. More Information on Adenoid Cystic Cancer: Head, Neck & Mouth Cancer
A rare type of cancer that usually begins in the salivary glands and often spreads to the breast. More Information on Adenoid Cystic Tumor: Head, Neck & Mouth Cancer
"Adenoid Hypertrophy" is more commonly referred to as "Enlarged Adenoids" in the medical community. Enlarged Adenoids
Also Known As: "Adenoiditis"
Enlarged lymph nodes in the back of the nose, above the roof of the mouth. This may cause a number of problems, including difficulty breathing through the nose, sore throat, difficulty swallowing and sleep apnea. More Information on Enlarged Adenoids: Nose & Throat
Surgical removal of the adenoids (glands in the upper portion of the throat, behind the nose). Performed to help prevent sinusitis and other conditions. More Information on Adenoidectomy: Nose & Throat
"Adenoiditis" is more commonly referred to as "Enlarged Adenoids" in the medical community. Enlarged Adenoids
Also Known As: "Adenoid Hypertrophy"
Enlarged lymph nodes in the back of the nose, above the roof of the mouth. This may cause a number of problems, including difficulty breathing through the nose, sore throat, difficulty swallowing and sleep apnea. More Information on Enlarged Adenoids: Nose & Throat
A benign (noncancerous) tumor that begins growing in the glands or glandular tissue. Individual growths may be called adenomatous polyps. If it also involved fibrous tissue, it may be called fibroadenoma. More Information on Adenoma: Cancer Basics
A benign (noncancerous) tumor that begins growing in the glands or glandular tissue. Individual growths may be called adenomatous polyps. If it also involved fibrous tissue, it may be called fibroadenoma. More Information on Adenomatous Polyps: Cancer Basics
A condition in which cells that make up the lining of the uterus (endometrium) grow into the muscle wall of the uterus (myometrium). It may cause similar symptoms as endometriosis, but is a separate condition. More Information on Adenomyosis: Uterine & Ovarian Health
A condition in which cells that make up the lining of the uterus (endometrium) grow into the muscle wall of the uterus (myometrium). It may cause similar symptoms as endometriosis, but is a separate condition. More Information on Adenomyosis Uteri: Uterine & Ovarian Health
"Adenosine Stress Test" is more commonly referred to as "Pharmacological Stress Test" in the medical community. Pharmacological Stress Test
Also Known As: "Dobutamine Stress Test, Dipyridamole Stress Test, Persantine Stress Test, Epinephrine Infusion QT Stress Test"
A test (e.g., an EKG or echocardiogram) that shows the activity of the heart both at rest and shortly after physical stress. A chemical is injected to show what the heart would be doing under physical stress, though the person is at rest. More Information on Pharmacological Stress Test: Heart Imaging & Rhythm Tests
"Adenosine Triphosphate Creatine Phosphate Energy System" is more commonly referred to as "ATP CP Energy System" in the medical community. ATP CP Energy System
The metabolic sequence used by the body to provide the muscles with energy through muscular contractions. Adenosine triphosphate (ATP) is stored in muscle cells. Creatine phosphate (CP) replenishes ATP when depleted.
A family of viruses that may affect many organs in the body. While they most commonly cause respiratory illnesses, they may also cause conditions affecting the eyes, stomach, intestines and skin. More Information on Adenovirus: Infectious Disease Basics
An estimate of the daily requirement for a nutrient that is assumed to be adequate for most healthy people. They are based on observed intakes and are used when an RDA cannot be determined due to a lack of strong scientific data. More Information on Adequate Intake: Nutrition Basics
"ADHD" is more commonly referred to as "Attention Deficit Hyperactivity Disorder" in the medical community. Attention Deficit Hyperactivity Disorder
Also Known As: "Attention Deficit Disorder, Attention Deficit Hyperactive Disorder, ADD"
A neurological disorder characterized by inattentiveness, inability to concentrate, impulsiveness and hyperactivity often accompanied by restlessness, disorganization and mood swings. More Information on Attention Deficit Hyperactivity Disorder: Attention & Learning Disorders
Medications used to treat attention deficit hyperactivity disorder (ADHD). While many may have a stimulating effect in most people, they have a calming affect in ADHD patients. These include methylphenidate and dextroamphetamine, among others. More Information on ADHD Drugs: Attention & Learning Disorders
Also Known As: "ADHD Drugs, ADD Medications, ADD Drugs"
Medications used to treat attention deficit hyperactivity disorder (ADHD). While many may have a stimulating effect in most people, they have a calming affect in ADHD patients. These include methylphenidate and dextroamphetamine, among others. More Information on ADHD Medications: Attention & Learning Disorders
Bands of web-like scar tissue that bind normally separate organs together, particularly those in the abdominal cavity (including the intestines). They generally form following inflammation or injury. More Information on Adhesions: Abdominal Pain
"Adhesive Capsulitis" is more commonly referred to as "Frozen Shoulder" in the medical community. Frozen Shoulder
A disorder that causes severe pain and stiffening of the shoulder. It may involve inflammation, adhesions (scar tissue) growing in between joint surfaces and/or a lack of synovial fluid (which lubricates joints). It may be due to disease or injury. More Information on Frozen Shoulder: Back, Neck & Shoulder Pain
"Adhesive Pericarditis" is more commonly referred to as "Pericarditis" in the medical community. Pericarditis
Also Known As: "Postmyocardial Pericarditis, Acute Pericarditis, Bacterial Pericarditis, Polyserositis, Chronic Pericarditis, Constrictive Pericarditis"
An inflammation of the pericardium - a thin, fluid-filled sac surrounding the heart. It is frequently associated with chest pain that worsens with deep breaths. More Information on Pericarditis: Heart Injuries & Infections
"ADI" is more commonly referred to as "Acceptable Daily Intake" in the medical community. Acceptable Daily Intake
A stated amount of a particular substance and or chemical in food that is deemed safe if consumed daily over a lifetime. If the specified amount is not exceeded there should be no health risks for humans. More Information on Acceptable Daily Intake: Nutrition Basics
"ADI R" is more commonly referred to as "Autism Diagnosis Interview Revised" in the medical community. Autism Diagnosis Interview Revised
An instructor-based interview for the diagnosis of autism. This revised version has been reorganized and restructured for patients with mental ages from 18 months to adulthood. More Information on Autism Diagnosis Interview Revised: Autism & Related Disorders
"Adjunct Medicine" is more commonly referred to as "Complementary & Alternative Medicine" in the medical community. Complementary & Alternative Medicine
Also Known As: "CAM, Adjunctive Therapy"
Complementary and alternative medicine ranges from commonly accepted practices to the most controversial practices. They are not a part of medical school curriculum and not usually practiced in hospitals. More Information on Complementary & Alternative Medicine: Herbs & Supplements
"Adjunctive Therapy" is more commonly referred to as "Complementary & Alternative Medicine" in the medical community. Complementary & Alternative Medicine
Also Known As: "CAM, Adjunct Medicine"
Complementary and alternative medicine ranges from commonly accepted practices to the most controversial practices. They are not a part of medical school curriculum and not usually practiced in hospitals. More Information on Complementary & Alternative Medicine: Herbs & Supplements
"Adjustable Gastric Banding" is more commonly referred to as "Gastric Banding" in the medical community. Gastric Banding
Also Known As: "Stomach Banding, Laparoscopic Adjustable Gastric Banding, Gastric Banding Surgery, Nonadjustable Gastric Banding, LAGB, Laparoscopic Gastric Banding"
A surgical procedure where a band is placed around part of the stomach, resulting in a small pouch and main stomach with a small opening between the two. It may be used in the treatment of obesity. More Information on Gastric Banding: Bariatric Surgery
Faulty adaptation to major stress or life changes resulting in emotions and behaviors greater than would be expected or that significantly impairs function. Occurs within three months of the stressor. More Information on Adjustment Disorder: Emotional Health Basics
"ADL" is more commonly referred to as "Activities of Daily Living" in the medical community. Activities of Daily Living
Basic activities that are performed as part of everyday life. They include bathing, dressing, grooming, eating, going to the bathroom and transferring (e.g., moving from a chair to a bed). They are used to measure level of impairment.
A compound normally removed from the body by the kidneys. High levels in the blood (due to kidney disease) may make it harder for blood vessels to dilate (or widen). Researchers are investigating this possible link between kidney and heart disease.
Children and young adults between the ages of 11 and 21. During this stage, physical and sexual maturation are completed, cognitive abilities are refined and intimate relationships established. More Information on Adolescence: Puberty & Sexual Maturity
A developmental stage that occurs from 11 to 21 years old. During this stage, physical and sexual maturation are completed, cognitive abilities are refined and intimate relationships established. More Information on Adolescent Development: Growth & Development
Legal creation of a parent-child relationship between people who are not of that biological relationship. It is a common alternative for people with fertility issues. More Information on Adoption: Fertility Issues
"ADOS G" is more commonly referred to as "Autism Diagnostic Observation Schedule" in the medical community. Autism Diagnostic Observation Schedule
An assessment of the communication and social skills, imagination and play behavior of patients with language skill at or above a three year old level who may have autism. More Information on Autism Diagnostic Observation Schedule: Autism & Related Disorders
A rare tumor that may cause excess production of hormones, which may trigger a number of different systems, including high blood pressure. Most adrenal tumors, however, are benign. More Information on Adrenal Cancer: Endocrine System Cancer
Also Known As: "Cancer of the Adrenal Cortex, Adrenal Cortex Tumor"
A condition in which malignant cells develop in the tissue surrounding the adrenal gland (adrenal cortex). This differs from cancer inside the gland (pheochromocytoma). More Information on Adrenal Cortex Cancer: Endocrine System Cancer
Also Known As: "Cancer of the Adrenal Cortex, Adrenal Cortex Cancer"
A condition in which malignant cells develop in the tissue surrounding the adrenal gland (adrenal cortex). This differs from cancer inside the gland (pheochromocytoma). More Information on Adrenal Cortex Tumor: Endocrine System Cancer
"Adrenal Gland Tumor" is more commonly referred to as "Pheochromocytoma" in the medical community. Pheochromocytoma
Also Known As: "Pheochromocytosis, Pheo"
A tumor (a mass of abnormal cells) that grows in specific body cells primarily found in the adrenal gland. They can cause the gland to produce too many hormones leading to severe high blood pressure. Tumors are usually benign, but can be cancerous. More Information on Pheochromocytoma: Blood Pressure
Two body organs located above the kidneys that secrete a number of hormones necessary to body functions, including insulin. Insulin is needed to regulate blood sugar (glucose) levels in the body. More Information on Adrenal Glands: Diabetes & Endocrine Basics
A rare tumor that may cause excess production of hormones, which may trigger a number of different systems, including high blood pressure. Most adrenal tumors, however, are benign. More Information on Adrenal Tumor: Endocrine System Cancer
A hormone and neurotransmitter produced by the adrenal glands and released into the circulatory system in response to physical or mental stress. It elevates heart and respiration rates. More Information on Adrenaline: Heart Basics
Having to do with the outer layer of the adrenal glands, two body organs located above the kidneys that secrete a number of hormones necessary to body functions. More Information on Adrenocortical: Endocrine System Cancer
Also Known As: "Cancer of the Adrenal Cortex, Adrenal Cortex Cancer, Adrenal Cortex Tumor"
A condition in which malignant cells develop in the tissue surrounding the adrenal gland (adrenal cortex). This differs from cancer inside the gland (pheochromocytoma). More Information on Adrenocortical Carcinoma: Endocrine System Cancer
Also Known As: "Juvenile Adrenocortical Carcinoma, Pediatric Adrenocortical Carcinoma"
A rare condition in which malignant cells develop in the tissue surrounding the adrenal gland (adrenal cortex). While this can occur in adults, it is considered a different disease with different behaviors in children. More Information on Adrenocortical Carcinoma in Children: Pediatric Cancer
A genetic condition that results in damage to myelin (a substance that insulates nerves). It is more common in men and is usually diagnosed by age 10. It is often fatal, but treatment can extend life. More Information on Adrenoleukodystrophy: Birth & Genetic Disorders
A class of antidiarrheal medications that work by binding fluids to them, helping stool to be less watery. More Information on Adsorbent Drugs: Digestive Medications
A class of antidiarrheal medications that work by binding fluids to them, helping stool to be less watery. More Information on Adsorbent Medications: Digestive Medications
Also Known As: "Adsorbent Medications, Adsorbent Drugs"
A class of antidiarrheal medications that work by binding fluids to them, helping stool to be less watery. More Information on Adsorbents: Digestive Medications
"Adult Acne" is more commonly referred to as "Rosacea" in the medical community. Rosacea
Also Known As: "Acne Rosacea"
A skin disorder leading to redness and pimples on the nose, forehead, cheekbones and chin. It often looks like acne, but blackheads are almost never present. Most often affects women with fair skin, ages 30 to 50. More Information on Rosacea: Acne & Blemish
Also Known As: "Adult Attention Deficit Hyperactivity Disorder, Adult Attention Deficit Disorder"
Refers to attention deficit disorder or attention deficit hyperactivity disorder occurring in adulthood. Patients demonstrate inattentiveness, procrastination and problems with organization, concentration and getting work done. More Information on Adult ADD: Attention & Learning Disorders
Also Known As: "Adult ADD, Adult Attention Deficit Hyperactivity Disorder, Adult Attention Deficit Disorder"
Refers to attention deficit disorder or attention deficit hyperactivity disorder occurring in adulthood. Patients demonstrate inattentiveness, procrastination and problems with organization, concentration and getting work done. More Information on Adult ADHD: Attention & Learning Disorders
An assessment of patterns of attachment in adults persisting through generations. Often used prior to adoptions to evaluate the prospective parents' perceptions of their own childhood. More Information on Adult Attachment Interview: Emotional Health Basics
Also Known As: "Adult ADD, Adult Attention Deficit Hyperactivity Disorder"
Refers to attention deficit disorder or attention deficit hyperactivity disorder occurring in adulthood. Patients demonstrate inattentiveness, procrastination and problems with organization, concentration and getting work done. More Information on Adult Attention Deficit Disorder: Attention & Learning Disorders
Also Known As: "Adult Attention Deficit Disorder, Adult ADD"
Refers to attention deficit disorder or attention deficit hyperactivity disorder occurring in adulthood. Patients demonstrate inattentiveness, procrastination and problems with organization, concentration and getting work done. More Information on Adult Attention Deficit Hyperactivity Disorder: Attention & Learning Disorders
"Adult Chickenpox" is more commonly referred to as "Chickenpox" in the medical community. Chickenpox
Also Known As: "Chickenpox Rash, Chickenpox Virus"
Extremely contagious viral disease that causes hundreds of itchy, fluid-filled blisters that burst and form crusts. It usually affects children, and can be spread by direct contact, droplet transmission and airborne transmission. More Information on Chickenpox: Skin Related Infections
"Adult NCL" is more commonly referred to as "Kufs Disease" in the medical community. Kufs Disease
Also Known As: "Parry's Disease, Adult Neuronal Ceroid Lipofuscinosis"
A type of adult-onset neuronal ceroid lipofuscinosis, a progressive neurological disease that usually begins in childhood. It usually begins by age 40. While the age of death varies, it generally shortens life expectancy. More Information on Kufs Disease: Pediatric Brain & Nerve
"Adult Neuronal Ceroid Lipofuscinosis" is more commonly referred to as "Kufs Disease" in the medical community. Kufs Disease
Also Known As: "Parry's Disease, Adult NCL"
A type of adult-onset neuronal ceroid lipofuscinosis, a progressive neurological disease that usually begins in childhood. It usually begins by age 40. While the age of death varies, it generally shortens life expectancy. More Information on Kufs Disease: Pediatric Brain & Nerve
"Adult Onset Diabetes" is more commonly referred to as "Type 2 Diabetes" in the medical community. Type 2 Diabetes
Also Known As: "NIDDM, Maturity Onset Diabetes, Noninsulin Dependent Diabetes Mellitus"
The most common form of diabetes. Patients manufacture insulin (sometimes more than necessary) but their bodies do not use it effectively. Its cause is unknown, but it is linked to age, obesity, family history, lack of exercise and other factors. More Information on Type 2 Diabetes: Type 2 Diabetes Basics
Also Known As: "Type IV SMA, Type IV Spinal Muscular Atrophy"
A rare form of spinal muscular atrophy in which symptoms do not develop until adulthood, usually after age 35. Progression of the disease occurs more slowly than with other forms, but loss of function can occur in spurts. More Information on Adult Onset SMA: Movement Disorders
Also Known As: "Type IV SMA, Adult Onset SMA, Type IV Spinal Muscular Atrophy"
A rare form of spinal muscular atrophy in which symptoms do not develop until adulthood, usually after age 35. Progression of the disease occurs more slowly than with other forms, but loss of function can occur in spurts. More Information on Adult Onset Spinal Muscular Atrophy: Movement Disorders
Also Known As: "Adult Onset Systemic Juvenile Rheumatoid Arthritis, AOSD, Adult Onset Systemic JRA"
Adult onset of a system-wide form of rheumatoid arthritis usually (but rarely) found in children. Symptoms often involve high fever, rash and inflammation of organs (e.g., heart, lungs). It can be potentially life-threatening. More Information on Adult Onset Still's Disease: Arthritis
Also Known As: "AOSD, Adult Onset Systemic Juvenile Rheumatoid Arthritis"
Adult onset of a system-wide form of rheumatoid arthritis usually (but rarely) found in children. Symptoms often involve high fever, rash and inflammation of organs (e.g., heart, lungs). It can be potentially life-threatening. More Information on Adult Onset Systemic JRA: Arthritis
Adult onset of a system-wide form of rheumatoid arthritis usually (but rarely) found in children. Symptoms often involve high fever, rash and inflammation of organs (e.g., heart, lungs). It can be potentially life-threatening. More Information on Adult Onset Systemic Juvenile Rheumatoid Arthritis: Arthritis
"Adult Respiratory Distress Syndrome" is more commonly referred to as "Postpump Syndrome" in the medical community. Postpump Syndrome
Also Known As: "Systemic Inflammatory Response Syndrome, Acute Lung Injury, ARDS, Pump Syndrome"
A potentially fatal condition that occurs in only 1 to 2 percent of people who have had bypass surgery. Researchers continue to investigate its causes and treatments. More Information on Postpump Syndrome: Bypass Surgery
"Adult Rickets" is more commonly referred to as "Osteomalacia" in the medical community. Osteomalacia
Softening of the bones as a result of a deficiency of vitamin D. Symptoms include bending of the spine, bowing of the legs and increased risk for fractures. More Information on Osteomalacia: Bone Health
The regurgitation, re-chewing and usually re-swallowing of food in adult patients. It is different than reflux because it is voluntary and active. While common in infants, it is rare in adults and may be a learned habit or part of an eating disorder. More Information on Adult Rumination: GERD & Heartburn
"Adult Still's Disease" is more commonly referred to as "Still's Disease" in the medical community. Still's Disease
A form of arthritis mainly found in children and rarely in adults. Rash and spiking fevers are common. Heart-related concerns include pericarditis (inflammation of the sac around the heart) and pericardial effusion (fluid buildup around the heart). More Information on Still's Disease: Arthritis
An aggressive type of non-Hodgkin's lymphoma that is market by enlarged lymph nodes, liver and spleen along with skin and bone lesions and an elevated calcium level. More Information on Adult T Cell Leukemia Lymphoma: Leukemia & Bone Cancer
Documents that outline in advance how individuals want healthcare and other decisions to be made if they are unable to make decisions themselves. These documents include living wills, powers of attorney, healthcare proxies and organ donation cards. More Information on Advance Care Directives: Healthcare Basics
Documents that outline in advance how individuals want healthcare and other decisions to be made if they are unable to make decisions themselves. These documents include living wills, powers of attorney, healthcare proxies and organ donation cards. More Information on Advance Directives: Healthcare Basics
A diagnosis that is often based on how far a cancer has spread, how much cancer is present within a specific area, symptoms and whether there is effective treatment for the cancer. It is not synonymous with metastatic cancer. More Information on Advanced Cancer: Cancer Basics
Compounds that may play a role in certain potential complications of diabetes, including vascular disease, retinopathy, neuropathy and nephropathy. Their role is not yet understood. More Information on Advanced Glycation End Products: Diabetes & Endocrine Risks
"Advanced Periodontal Disease" is more commonly referred to as "Periodontitis" in the medical community. Periodontitis
Moderate to severe inflammation of the tissue surrounding and supporting teeth (gums) caused by bacterial infection. It is often preceded by gingivitis (mild periodontal disease) and is caused by plaque build-up between teeth and gums. More Information on Periodontitis: Oral Infections
Unit of the FDA charged with monitoring the use of individual food additives to determine whether they represent a threat to the general public. They also field relevant complaints from consumers. More Information on Adverse Reaction Monitoring System: Food Allergy & Intolerance
The pleading or representation of a person's needs by another qualified individual, usually because the person cannot represent his or her own needs. More Information on Advocacy: Therapy & Support
"Adynamic Ileus" is more commonly referred to as "Ileus" in the medical community. Ileus
Also Known As: "Paresis, Paralytic Ileus"
Loss of the ability for intestinal muscles to contract, resulting in obstruction due to inability to move food through the bowels. More Information on Ileus: Inflammatory Bowel (Colitis)
"AE 941" is more commonly referred to as "ABT 510" in the medical community. ABT 510
Also Known As: "BAY 12 9566, Carboxyamidotriazole, Batimastat"
A type of angiogenesis inhibitor, medications being researched for use in cancer therapy. These drugs block the development of new blood vessels that feed tumors, starving them of oxygen and nutrients. More Information on ABT 510: Cancer Drug & Medication
"AECG" is more commonly referred to as "Ambulatory Monitoring" in the medical community. Ambulatory Monitoring
Also Known As: "Ambulatory EKG, Loop Recorder, Ambulatory Electrocardiology, Electrocardiographic Ambulatory Monitoring, Intermittent Recorder, Event Monitor, Continuous Recorder"
The recording of heart activity while the patient is freely moving (ambulatory). Data often can be sent across phone lines to a monitoring station. More Information on Ambulatory Monitoring: Heart Imaging & Rhythm Tests
Also Known As: "Automatic External Defibrillator, Automatic External Cardioverter"
External devices that can be used by minimally trained laypersons in emergency situations to deliver an electric shock to "reset" a heart that is fibrillating (quivering instead of pumping) or stopped. More Information on AED: Arrhythmia
A mosquito native to Japan that is now found in the Southwestern United States and Midwest. It is marked by black and white striped legs and sometimes carries serious diseases. More Information on Aedes Albopictus: Infectious Disease Basics
An Asian mosquito first discovered in the United States in 1998 and now found in a number of eastern states. It may transmit both encephalitis and West Nile virus. More Information on Aedes Japonicus Mosquito: Infectious Disease Basics
"Aedes Triseriatus Encephalitis" is more commonly referred to as "La Crosse Encephalitis" in the medical community. La Crosse Encephalitis
Also Known As: "La Crosse Virus"
Encephalitis caused by infection transmitted by Aedes triseriatus. It occurs primarily in children, chiefly in the Midwestern United States. It can affect the central nervous system and cause sometimes fatal complications. More Information on La Crosse Encephalitis: Brain Related Infections
Also Known As: "Aerobic Endurance, Cardio Exercise, Aerobic Exercise, Cardio"
An organism or activity that requires oxygen to be present to survive. When referring to exercise, it is any activity that places a demand on the cardiovascular system.
"Aerobic Dance" is more commonly referred to as "Cardio Dance" in the medical community. Cardio Dance
A type of cardio activity that uses choreographed movements to raise heart rate. It is usually performed in a group class. While typically associated with dance-based movements it can also be themed around other activities like walking or kickboxing. More Information on Cardio Dance: Workouts A-Z
Also Known As: "Cardio Exercise, Aerobic Exercise, Cardio"
An organism or activity that requires oxygen to be present to survive. When referring to exercise, it is any activity that places a demand on the cardiovascular system.
Also Known As: "Cardio Exercise, Cardio, Aerobic Endurance"
An organism or activity that requires oxygen to be present to survive. When referring to exercise, it is any activity that places a demand on the cardiovascular system.
An irrational, disabling fear of fresh air or drafts. Often connected with a fear of harmful airborne particles that may or may not be present. Also, a fear of flying. More Information on Aerophobia: Anxiety Disorders
Any substance collected into tiny particles and then pressurized so that it can be dispursed in tiny droplets, like a mist. More Information on Aerosol: Cosmetic, Chemical & Metal
Any substance collected into tiny particles and then pressurized so that it can be dispursed in tiny droplets, like a mist. More Information on Aerosol Spray: Cosmetic, Chemical & Metal
"Aesthetic Dentistry" is more commonly referred to as "Cosmetic Dentistry" in the medical community. Cosmetic Dentistry
Technique for enhancing the appearance of chipped, misshapen, stained or otherwise damaged teeth. Examples include braces, tooth whitening, bonding, veneers and enamel shaping. More Information on Cosmetic Dentistry: Dental Bleaching & Appearance
"AF" is more commonly referred to as "Atrial Fibrillation" in the medical community. Atrial Fibrillation
Also Known As: "Transient Atrial Fibrillation, A-Fib, Lone Atrial Fibrillation"
A rapid, irregular heart rhythm caused by abnormal electrical impulses that begin in the upper chambers of the heart (atria). As a result, the heart's lower chambers (the ventricles) beat rapidly and irregularly. More Information on Atrial Fibrillation: Arrhythmia
"Affective Disorders" is more commonly referred to as "Mood Disorders" in the medical community. Mood Disorders
A mental disorder that affects mood and interferes with the ability to function. Examples include major depression and bipolar disorder. More Information on Mood Disorders: Depression & Bipolar
"Afferent Nerve" is more commonly referred to as "Nerve" in the medical community. Nerve
Also Known As: "Efferent Nerve"
A bundle of fibers that transmits electrical signals between the brain and spinal cord and areas of the body. Afferent nerves convey sensory signals to the brain, while efferent nerves carry stimulatory signals from the brain to muscles and glands. More Information on Nerve: Brain & Nerve Basics
A toxin produced by certain molds (aspergillus flavus and aspergillus parasiticus) that are found on improperly stored corn, potatoes, grains and nuts. It may cause primary liver cancer when ingested. More Information on Aflatoxin: Kidney, Liver & Urinary Cancer
"AFP" is more commonly referred to as "Alpha Fetoprotein" in the medical community. Alpha Fetoprotein
A protein normally found only in a developing fetus. When found in the blood of nonpregnant adults, it may indicate the presence of a germ cell tumor or primary liver cancer. More Information on Alpha Fetoprotein: Cancer Lab Tests
"AFP Test" is more commonly referred to as "Alpha Fetoprotein Test" in the medical community. Alpha Fetoprotein Test
A blood test to detect alpha fetoprotein, normally found only in a developing fetus. When found in the blood of nonpregnant adults, it may indicate the presence of a germ cell tumor or primary liver cancer. More Information on Alpha Fetoprotein Test: Cancer Lab Tests
Also Known As: "Gambian Sleeping Sickness, East African Trypanosomiasis, West African Trypanosomiasis, African Trypanosomiasis, Trypanosoma Brucei Rhodesiense, Trypanosoma Brucei Gambiense, East African Sleeping Sickness, West African Sleeping Sickness"
An illness caused by two parasites that trigger different diseases. East African is acute, while West African (Gambian) is chronic. Both are fatal if left untreated. The American form is called Chagas disease. More Information on African Sleeping Sickness: Parasitic Disease
Also Known As: "Gambian Sleeping Sickness, East African Trypanosomiasis, West African Trypanosomiasis, Trypanosoma Brucei Rhodesiense, Trypanosoma Brucei Gambiense, East African Sleeping Sickness, West African Sleeping Sickness"
An illness caused by two parasites that trigger different diseases. East African is acute, while West African (Gambian) is chronic. Both are fatal if left untreated. The American form is called Chagas disease. More Information on African Trypanosomiasis: Parasitic Disease
"Aganglionic Megacolon" is more commonly referred to as "Hirschsprung's Disease" in the medical community. Hirschsprung's Disease
Also Known As: "HD"
A birth defect where certain nerve cells are lacking in the large intestine preventing it from moving stool through, resulting in intestinal blockage that causes the abdomen to swell. More Information on Hirschsprung's Disease: Pediatric Digestive
Compounds that may play a role in certain potential complications of diabetes, including vascular disease, retinopathy, neuropathy and nephropathy. Their role is not yet understood. More Information on AGE: Diabetes & Endocrine Risks
A rise in longevity increases the incidence of cancer. People acquire mutations in genes as they become older. The mutations in genes that potentially cause cancer increase with a longer life span. More Information on Age & Cancer Risk: Cancer Risk Factors
The risk of developing type 1 and type 2 diabetes varies as people age. Type 1 and maturity onset diabetes in youth (MODY) are most commonly diagnosed in youth or early adulthood, while the risk of developing type 2 increases with age. More Information on Age & Diabetes: Diabetes & Endocrine Risks
The mother's age affects pregnancy risks for both her and her child. This is true whether the mother is very young (adolescent pregnancy) or older. More Information on Age & Pregnancy Risk: Pregnancy Management
"Age Related Discoloration" is more commonly referred to as "Tooth Discoloration" in the medical community. Tooth Discoloration
Also Known As: "Extrinsic Discoloration, Intrinsic Discoloration"
Abnormal coloring on the surface of a tooth, caused by stains changes in the tooth material. The three main categories are extrinsic discoloration, intrinsic discoloration and age-related discoloration. More Information on Tooth Discoloration: Tooth Decay & Damage
Pain associated with the aging process. People who are older are more likely to suffer from diseases that cause pain, such as arthritis, diabetes or cancer. They also are more likely to experience pain due to degenerative processes More Information on Age Related Pain: Pain Basics
"Age Spots" is more commonly referred to as "Liver Spots" in the medical community. Liver Spots
Also Known As: "Solar Lentigines"
Flat, brown-black spots associated with aging that often occur in sun-exposed body areas. They are unrelated to the liver or liver function. They are harmless but may obscure diagnosis of skin cancer. More Information on Liver Spots: Skin & Aging
AHRQ helps consumers and policymakers understand and/or make decisions about health care services. AHRQ research seeks to: improve health outcomes, reduce cost and expenses, and support the effective use of and access to the U.S. health care system.
Also Known As: "Agency for Health Care Policy and Research"
AHRQ helps consumers and policymakers understand and/or make decisions about health care services. AHRQ research seeks to: improve health outcomes, reduce cost and expenses, and support the effective use of and access to the U.S. health care system.
A condition present from birth in which the corpus callosum (which connects the left and right hemipheres of the brain) is partially or completely missing. It can occur alone or in combination with other birth defects. More Information on Agenesis of the Corpus Callosum: Pediatric Brain & Nerve
Compounds that may play a role in certain potential complications of diabetes, including vascular disease, retinopathy, neuropathy and nephropathy. Their role is not yet understood. More Information on AGEP: Diabetes & Endocrine Risks
A type of glycoprotein (a compound consisting of a carbohydrate and a protein) that provides structure and stiffness to body tissues, such as joint cartilage and tendons.
"Aggressive Fibromatosis" is more commonly referred to as "Desmoid Tumor" in the medical community. Desmoid Tumor
A very rare tumor that develops in the tissue surrounding the muscles, usually in the abdomen. It rarely metastasizes (spreads). More Information on Desmoid Tumor: Cancer Basics
As people age, the heart undergoes natural and gradual changes, such as a decreasing heart rate, a stiffening of the arteries and increasing blood pressure. Yet a decline in heart performance may be slowed with proper care, good diet and exercise.
Internal factors (such as heredity) and external factors (such as sunlight) contribute to changes in appearance of the skin over time. Results can include the appearance of wrinkles and hair loss. More Information on Aging & the Skin: Skin & Aging
Pain associated with the aging process. People who are older are more likely to suffer from diseases that cause pain, such as arthritis, diabetes or cancer. They also are more likely to experience pain due to degenerative processes More Information on Aging Pain: Pain Basics
"AGIs" is more commonly referred to as "Alpha Glucosidase Inhibitors" in the medical community. Alpha Glucosidase Inhibitors
A class of medications used to treat type 2 diabetes. They work by slowing digestion. As food breaks down, blood sugar (glucose) is released. Slowing digestion helps prevent glucose levels from rising sharply after meals. More Information on Alpha Glucosidase Inhibitors: Diabetes & Endocrine Drugs
Also Known As: "Myelosclerosis with Myeloid Metaplasia, Chronic Idiopathic Myelofibrosis, Idiopathic Myelofibrosis, Primary Myelofibrosis"
A chronic, progressive disease in which blood is made in the liver, spleen or other body areas because the bone marrow has been replaced with fibrous tissue. It usually involves spleen enlargement and anemia. More Information on Agnogenic Myeloid Metaplasia: Leukemia & Bone Cancer
A loss of the ability to recognize or interpret stimuli even though senses and memory functions are still intact. It is often seen with neurological illness. More Information on Agnosia: Neuro Signs & Symptoms
An irrational, disabling fear of situations where it is difficult to escape or get help, such as open spaces or crowds of people, often resulting in a panic attack. In some cases, this results in a fear of going into any public or "not safe" place. More Information on Agoraphobia: Anxiety Disorders
"Agyria Pachygyria Syndrome" is more commonly referred to as "Miller Dieker Syndrome" in the medical community. Miller Dieker Syndrome
Also Known As: "Classical Lissencephaly, Miller-Dieker Lissencephaly Syndrome, MDLS, Agyria Syndrome"
A multiple congenital anomaly/mental retardation (MCA/MR) syndrome that primarily affects the brain. It may also include one or more congenital heart defects such as patent ductus arteriosus or ventricular septal defects. More Information on Miller Dieker Syndrome: Pediatric Heart
"Agyria Syndrome" is more commonly referred to as "Miller Dieker Syndrome" in the medical community. Miller Dieker Syndrome
Also Known As: "Classical Lissencephaly, Miller-Dieker Lissencephaly Syndrome, MDLS, Agyria Pachygyria Syndrome"
A multiple congenital anomaly/mental retardation (MCA/MR) syndrome that primarily affects the brain. It may also include one or more congenital heart defects such as patent ductus arteriosus or ventricular septal defects. More Information on Miller Dieker Syndrome: Pediatric Heart
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