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.
The primitive aspect of the self, functioning on unconscious instinct and driven by the desire for pleasure. More Information on Id: Emotional Health Basics
"IDDM" is more commonly referred to as "Type 1 Diabetes" in the medical community. Type 1 Diabetes
Also Known As: "Juvenile Diabetes, Insulin Dependent Diabetes Mellitus"
A condition in which the pancreas does not produce insulin. It usually develops in childhood or adolescence, but can appear at any age. It occurs when the body's immune system destroys insulin-producing beta cells in the pancreas. More Information on Type 1 Diabetes: Type 1 Diabetes Basics
"Ideal Weight" is more commonly referred to as "Healthy Weight" in the medical community. Healthy Weight
A body weight range that is considered to be healthy for an individual. Those who weigh more than their healthy body weight range are considered overweight. More Information on Healthy Weight: Weight & Obesity Basics
A mechanism in which the something, such as the self, another person or a practice, is attributed unrealistically positive qualities, bringing the given thing closer to the patient's concept of the ideal.
The unfounded interpretation of events as having personal significance to the patient, such as the idea that an overheard conversation or a story, as from a book or television, are all bout him or her when they were actually not.
"IDET" is more commonly referred to as "Intradiscal Electrothermal Therapy" in the medical community. Intradiscal Electrothermal Therapy
Also Known As: "IDET Therapy"
A minimally invasive surgery to relieve chronic pain associated with damaged or herniated spinal discs. Controlled levels of heat are applied to the disc wall to desensitize pain receptors, reduce any bulging and close fissures (tiny fractures). More Information on Intradiscal Electrothermal Therapy: Pain Management
"IDET Therapy" is more commonly referred to as "Intradiscal Electrothermal Therapy" in the medical community. Intradiscal Electrothermal Therapy
Also Known As: "IDET"
A minimally invasive surgery to relieve chronic pain associated with damaged or herniated spinal discs. Controlled levels of heat are applied to the disc wall to desensitize pain receptors, reduce any bulging and close fissures (tiny fractures). More Information on Intradiscal Electrothermal Therapy: Pain Management
"Idiopathic Dilated Cardiomyopathy" is more commonly referred to as "Dilated Cardiomyopathy" in the medical community. Dilated Cardiomyopathy
Also Known As: "DCM, Congestive Cardiomyopathy"
A condition in which the heart's ability to pump blood is reduced because the left ventricle (one of the two pumping chambers of the heart) is enlarged (dilated). More Information on Dilated Cardiomyopathy: Heart Failure
"Idiopathic Hypertrophic Subaortic Stenosis" is more commonly referred to as "Hypertrophic Cardiomyopathy" in the medical community. Hypertrophic Cardiomyopathy
Also Known As: "Hypertrophic Obstructive Cardiomyopathy, HOCM, IHSS, Concentric Hypertrophic Cardiomyopathy, ASH, Asymmetric Septal Hypertrophy, Hypertensive Hypertrophic Cardiomyopathy"
An abnormal growth of muscle fibers on the heart muscle, often causing a thickened septum. It can lead to sudden cardiac death and is a major cause of death in young athletes. More Information on Hypertrophic Cardiomyopathy: Heart Failure
"Idiopathic Hypoproteinemia" is more commonly referred to as "Intestinal Lymphangiectasia" in the medical community. Intestinal Lymphangiectasia
A condition characterized by swollen or enlarged lymph nodes in the small intestine, resulting in an inability to properly absorb fat and proteins into the blood. More Information on Intestinal Lymphangiectasia: Digestive Health Basics
"Idiopathic Inflammatory Myositis" is more commonly referred to as "Myositis" in the medical community. Myositis
A term used to describe several conditions involving inflammation of the muscle, including polymyositis (many muscles are affected), dermatomyositis (skin is also affected) and inclusion body myositis (progressive wasting of the upper extremities). More Information on Myositis: Fibromyalgia & Pain Disorders
"Idiopathic Intracranial Hypertension" is more commonly referred to as "Pseudotumor Cerebri" in the medical community. Pseudotumor Cerebri
Also Known As: "Primary Intracranial Hypertension, Benign Intracranial Hypertension"
A type of intracranial hypertension in which pressure within the skull increases with no known cause. It produces symptoms that mimic a brain tumor. More Information on Pseudotumor Cerebri: Brain & Nerve Basics
"Idiopathic Myelofibrosis" is more commonly referred to as "Agnogenic Myeloid Metaplasia" in the medical community. Agnogenic Myeloid Metaplasia
Also Known As: "Myelosclerosis with Myeloid Metaplasia, Chronic 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
"Idiopathic Pulmonary Hypertension" is more commonly referred to as "Pulmonary Hypertension" in the medical community. Pulmonary Hypertension
Also Known As: "Secondary Pulmonary Hypertension, PAH, Ayerza Syndrome, Primary Pulmonary Hypertension, Pulmonary Arterial Hypertension"
High blood pressure in the blood vessels of the lungs. Primary PH has no known cause. Secondary PH is caused by an underlying heart condition, lung disease or pulmonary embolism. PH can result in right-side heart failure (cor pulmonale) over time. More Information on Pulmonary Hypertension: Breathing & Lung
"Idiopathic Thrombocytopenia" is more commonly referred to as "Thrombocytopenia" in the medical community. Thrombocytopenia
Also Known As: "Essential Thrombocytopenia"
Any disorder in which there are not enough platelets, which are needed to help blood to clot. People with this condition may experience abnormal bleeding. More Information on Thrombocytopenia: Anemia & Blood Disorders
"Idioventricular Rhythm" is more commonly referred to as "Escape Beats" in the medical community. Escape Beats
Also Known As: "Junctional Escape Beats, Escape Contraction, Ventricular Escape Beats, Escape Complex"
Signals sent to pace the heart from areas other than the sinus node (the heart's natural pacemaker). If the node is damaged, then either the AV junction (junctional escape beats) or the ventricles (ventricular escape beats) can send pacing signals. More Information on Escape Beats: Arrhythmia
"IDL" is more commonly referred to as "Intermediate Density Lipoprotein" in the medical community. Intermediate Density Lipoprotein
A type of lipoprotein belonging to a category known as "non-HDL cholesterol." IDLs (along with LDLs and VLDLs) transport cholesterol not found in "good" HDLs. High levels of non-HDL cholesterol increase the risk of heart disease. More Information on Intermediate Density Lipoprotein: Cholesterol
"IEPs" is more commonly referred to as "Individualized Education Plans" in the medical community. Individualized Education Plans
Specialized services that may be available to children with a disability that interferes with regular schooling or advanced skills that make regular school less stimulating. These are usually provided in the school setting at no additional charge. More Information on Individualized Education Plans: Healthcare Basics
"IFFGD" is more commonly referred to as "International Foundation for Functional Gastrointestinal Disorders" in the medical community. International Foundation for Functional Gastrointestinal Disorders
An international, non-profit organization concerned with functional and motility disorders of the gastrointestinal tract and dedicated to increased awareness, research and education.
"IFG" is more commonly referred to as "Prediabetes" in the medical community. Prediabetes
Also Known As: "Chemical Diabetes, Borderline Diabetes, Impaired Fasting Glucose, Subclinical Diabetes, Impaired Glucose Tolerance, Latent Diabetes, IGT"
A condition in which glucose (blood sugar) levels are higher than normal, but not high enough to classify the patient as having diabetes. Formerly known as latent, borderline, subclinical or chemical diabetes, it may or may not progress to diabetes. More Information on Prediabetes: Diabetes & Endocrine Basics
A condition in which glucose (blood sugar) levels are higher than normal, but not high enough to classify the patient as having diabetes (formerly known as latent, borderline, subclinical or chemical diabetes). It may or may not progress to diabetes. More Information on Prediabetes & Children: Pediatric Diabetes
"IFOBT" is more commonly referred to as "Fecal Occult Blood Test" in the medical community. Fecal Occult Blood Test
Also Known As: "FOBT, Immunologic Fecal Occult Blood Test, Immunoassay Fecal Occult Blood Test, Immunochemical Fecal Occult Blood Test"
A test to detect hidden blood in the stool, which may be a sign of cancer. It is not a test of the blood, but rather a test for blood in a stool sample. It may be used as a screening tool for colorectal cancer. More Information on Fecal Occult Blood Test: Gastrointestinal System Cancer
"Ifosfamide" is more commonly referred to as "Chlorambucil" in the medical community. Chlorambucil
Also Known As: "Carmustine, Busulfan, Melphalan, Lomustine, Mechlorethamine, Cyclophosphamide, Uracil Mustard"
A type of alkylating agent, which are a family of anticancer drugs that combines with a cancer cell's DNA to interferes with cell division. More Information on Chlorambucil: Cancer Drug & Medication
"IgE" is more commonly referred to as "Immunoglobulin E" in the medical community. Immunoglobulin E
Also Known As: "IgE Antibody"
A type of antibody, produced by white blood cells to fight infection, that attaches to the body's mast cells. This causes the mast cell to release histamines, which are responsible for allergic reactions (e.g., sneezing, watery eyes). More Information on Immunoglobulin E: Allergy Basics
"IgE Antibody" is more commonly referred to as "Immunoglobulin E" in the medical community. Immunoglobulin E
Also Known As: "IgE"
A type of antibody, produced by white blood cells to fight infection, that attaches to the body's mast cells. This causes the mast cell to release histamines, which are responsible for allergic reactions (e.g., sneezing, watery eyes). More Information on Immunoglobulin E: Allergy Basics
"IGT" is more commonly referred to as "Prediabetes" in the medical community. Prediabetes
Also Known As: "Chemical Diabetes, Borderline Diabetes, Impaired Fasting Glucose, Subclinical Diabetes, Impaired Glucose Tolerance, Latent Diabetes, IFG"
A condition in which glucose (blood sugar) levels are higher than normal, but not high enough to classify the patient as having diabetes. Formerly known as latent, borderline, subclinical or chemical diabetes, it may or may not progress to diabetes. More Information on Prediabetes: Diabetes & Endocrine Basics
A condition in which glucose (blood sugar) levels are higher than normal, but not high enough to classify the patient as having diabetes (formerly known as latent, borderline, subclinical or chemical diabetes). It may or may not progress to diabetes. More Information on Prediabetes & Children: Pediatric Diabetes
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