| RVA | re-entrant ventricular arrhythmia; right ventricle activation; right vertebral artery |
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| RA | radioactive; ragocyte; ragweed antigen; rapidly adapting [receptors]; reactive arthritis; reciprocal... |
| RH | radiant heat; radiation hybrid; radiological health; reactive hyperemia; recurrent herpes; regulator... |
| RS | radioscaphoid; random sample; rating schedule; Raynaud syndrome; recipient's serum; rectal sinus; re... |
| RUL | right upper eyelid; right upper lateral; right upper limb; right upper lobe |
| haemangiectatic hypertrophy | <syndrome> A congenital malformation syndrome characterised by the triad of asymmetric limb hypertrophy, haemangiomata, and nevi. Asymmetric limb hypertrophy is enlargement of one limb and not the corresponding limb on the other side, the enlarged limb being 3 times more likely to be a leg than an arm in ktw; and the limb enlargement is of bone as well as soft tissue. The haemangiomas, abnormal nests of blood vessels that proliferate inappropriately and excessively, cover a remarkable range from small innocuous capillary haemangiomas ( strawberry marks ) to huge cavernous haemangiomas. The nevi are pigmented moles on the skin; in ktw there are often also dark linear streaks on the skin, streaks due to too much pigment. There can be other abnormalities but the triad is the consistent clinical centrepiece of the disease. most persons with ktw have an enlarged leg and do relatively well without treatment or, for example, with only compression from an elastic stocking. Skin ulcers and other skin problems can occur over the swollen leg. Usually, the treatment is conservative. Surgery is almost never needed. The only possible exceptions are the very rare situations in which the leg reaches gigantic proportions or secondary clotting difficulties arise (due to trapping and destruction of blood platelets in a huge haemangioma). Then, amputation may become necessary. The cause of ktw syndrome is unknown. (12 Dec 1998) |
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| simple hypertrophy | Increase in size of cells. (05 Mar 2000) |
| simulated hypertrophy | Increased size of a part due to continued growth unrestrained by attritions, as is seen in the case of the teeth of certain animals when the opposing teeth have been destroyed. (05 Mar 2000) |
| hypertrophy | The enlargement or overgrowth of an organ or part due to an increase in size of its constituent cells. Compare: hyperplasia. Origin: Gr. Troph = nutrition (18 Nov 1997) |
| hypertrophy, left ventricular | Enlargement of the left ventricle of the heart. This increase in ventricular mass is attributed to sustained abnormal pressure or volume loads and is a contributor to cardiovascular morbidity and mortality. (12 Dec 1998) |
| numerical hypertrophy | <pathology> The abnormal multiplication or increase in the number of normal cells in normal arrangement in a tissue. Compare: hypertrophy. Origin: Gr. Plasis = formation (18 Nov 1997) |
| quantitative hypertrophy | <pathology> The abnormal multiplication or increase in the number of normal cells in normal arrangement in a tissue. Compare: hypertrophy. Origin: Gr. Plasis = formation (18 Nov 1997) |
| eccentric hypertrophy | Thickening of the wall of the heart or other cavity, with dilation. (05 Mar 2000) |
| endemic hypertrophy | Enlargement of the calcaneus preceded by fever and pain in the heel, reported from the Gold Coast (now Ghana) and in Taiwan among the indigenous population. (05 Mar 2000) |
| true hypertrophy | An increase in size involving all the different tissues composing the part. (05 Mar 2000) |
| false hypertrophy | Increase in size of an organ or a part, due not to increase in size or number of the specific functional elements but to that of some other tissue, fatty or fibrous. Synonym: false hypertrophy. (05 Mar 2000) |
| left ventricular hypertrophy | <radiology> Coarctation, aortic stenosis (12 Dec 1998) |
| functional hypertrophy | Temporary increase in size of an organ or part to provide for a natural increase of function, such as the kind that occurs in the walls of the uterus and in the mammae during pregnancy. Synonym: functional hypertrophy. (05 Mar 2000) |
| lipomatous hypertrophy | Nonencapsulated adipose tissue forming a lipoma-like mass, usually in the cardiac interatrial septum where it may cause arrhythmia and sudden death. Synonym: lipomatous hypertrophy. (05 Mar 2000) |
| Arantius' ventricle | Inferior part of the rhomboid fossa; the narrow lower end of the fourth ventricle between the two clavae. Synonym: Arantius' ventricle. Origin: L. Writing pen (05 Mar 2000) |