| IH | idiopathic hirsutism; idiopathic hypercalciuria; immediate hypersensitivity; incompletely healed; in... |
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| IHC | idiopathic hemochromatosis; idiopathic hypercalciuria; immunohistochemistry; inner hair cell; intrah... |
| IHH | idiopathic hypogonadotropic hypogonadism; idiopathic hypothalamic hypogonadism; infectious human hep... |
| IHP | idiopathic hypoparathyroidism; idiopathic hypopituitarism; individualized health plan; inositol hexa... |
| IIP | idiopathic interstitial pneumonia; idiopathic intestinal pseudo-obstruction; increased intracranial ... |
| idiopathic aldosteronism | An adrenocortical disorder caused by excessive secretion of aldosterone and characterised by headaches, nocturia, polyuria, fatigue, hypertension, potassium depletion, hypokalaemic alkalosis, hypervolaemia, and decreased plasma renin activity; may be associated with small benign adrenocortical adenomas. Synonym: Conn's syndrome, idiopathic aldosteronism. (05 Mar 2000) |
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| idiopathic bilateral vestibulopathy | Slowly progressive disorder affecting young to middle-aged adults, manifested as gait unsteadiness (especially when visual cues are absent) and oscillopsia, unaccompanied by vertigo and hearing loss. (05 Mar 2000) |
| idiopathic bone cavity | A unilocular cyst containing serous fluid and lined with a thin layer of connective tissue, occurring usually in the shaft of a long bone in a child. Synonym: idiopathic bone cavity, osteocystoma, simple bone cyst, traumatic bone cyst, unicameral bone cyst. (05 Mar 2000) |
| idiopathic bradycardia | A slow pulse for which no cause can be discovered. Synonym: idiopathic bradycardia. (05 Mar 2000) |
| idiopathic cardiomyopathy | Cardiomyopathy of unknown or obscure cause. A disease that affects mainly the heart muscle, sparing other cardiac structures and usually resulting in fibrosis, hypertrophy, or both. Synonym: idiopathic cardiomyopathy. (05 Mar 2000) |
| idiopathic disease | A disease of unknown cause or mechanism. (05 Mar 2000) |
| idiopathic epilepsy | An epilepsy without evident cause; term often used to describe the genetic epilepsies. Synonym: generalised tonic-clonic seizure. (05 Mar 2000) |
| idiopathic fibrous hyperplasia | A condition of cystic bone growth that results from abnormal bone development. May occur with bone lesions, skin pigmentation and endocrine abnormalities. See: McCune-Albright syndrome. Origin: Gr. Plassein = to form (27 Sep 1997) |
| idiopathic fibrous mediastinitis | <radiology> Histoplasmosis most common cause, can cause superior vena cava obstruction (12 Dec 1998) |
| idiopathic fibrous retroperitonitis | <radiology> Ureters tapered or obstructed, most severe at L4-5, ureters deviated medially, Treatment: symptomatic; steroids have ? long-term benefit Differential diagnosis: malignancy, lymphoma (especially Hodgkin's), metastasis from colon and breast, retroperitoneal sarcoma, drugs, methysergide (Sansert), haemorrhage, aortic aneurysm, trauma or surgery, inflammation, Crohn's disease, diverticulitis, pancreatitis, extravasated urine, radiation (12 Dec 1998) |
| idiopathic gout | Acute episodes of crystal-induced synovitis due to abnormality of purine metabolism; lower than normal urinary excretion of urate leading to hyperuricaemia and acute episodes of joint inflammation. Synonym: primary gout. Interval gout, an asymptomatic phase between acute attacks of gout. Latent gout, hyperuricaemia without symptoms of gout. Often used synonymously with interval gout. Synonym: masked gout. (05 Mar 2000) |
| idiopathic hirsutism | Hirsutism of uncertain origin in women, who may additionally exhibit menstrual abnormalities and infertility. (05 Mar 2000) |
| idiopathic hypercalcaemic sclerosis of infants | See: idiopathic hypercalcaemia of infants. (05 Mar 2000) |
| idiopathic hyperlipaemia | Hyperlipoproteinaemia characterised by the presence of large amounts of chylomicrons and triglycerides in the plasma when the patient has a normal diet, and their disappearance on a fat-free diet; low alpha-and beta-lipoproteins on a normal diet, with increase on fat-free diet; decreased plasma postheparin lipolytic activity; and low tissue lipoprotein lipase activity. It is accompanied by bouts of abdominal pain, hepatosplenomegaly, pancreatitis, and eruptive xanthomas; autosomal recessive inheritance. See: familial lipoprotein lipase inhibitor. Synonym: Burger-Grutz syndrome, familial fat-induced hyperlipaemia, familial hyperchylomicronaemia, familial hypertriglyceridemia, idiopathic hyperlipaemia. (05 Mar 2000) |
| idiopathic hypertension | Hypertension without known cause. Synonym: idiopathic hypertension, primary hypertension. (05 Mar 2000) |