| polycystic liver | Gradual cystic dilation of intralobular bile ducts (Meyenburg's complexes) that fail to involute in embryologic development of the liver; frequently associated with bilateral congenital polycystic kidneys and occasionally with cystic involvement of the pancreas, lungs, and other organs. Synonym: polycystic liver disease. (05 Mar 2000) |
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| polycystic liver disease | Gradual cystic dilation of intralobular bile ducts (Meyenburg's complexes) that fail to involute in embryologic development of the liver; frequently associated with bilateral congenital polycystic kidneys and occasionally with cystic involvement of the pancreas, lungs, and other organs. Synonym: polycystic liver disease. (05 Mar 2000) |
| polycystic ovarian disease | <disease> A condition found among women who do not ovulate, characterised by multiple ovarian cysts and increased androgen production. (09 Oct 1997) |
| polycystic ovary | Enlarged cystic ovary's, pearl white in colour, with thickened tunica albuginea, characteristic of the Stein-Leventhal syndrome; clinical features are abnormal menses, obesity, and evidence of masculinization, such as hirsutism. (05 Mar 2000) |
| polycystic ovary syndrome | <syndrome> Clinical symptom complex characterised by oligomenorrhoea or amenorrhoea, anovulation, and regularly associated with bilateral polycystic ovaries. (12 Dec 1998) |
| polycystid | <zoology> One of the Polycystidea. One of the Polycystina. Pertaining to the Polycystidea, or the Polycystina. Source: Websters Dictionary (01 Mar 1998) |
| polycystidea | <zoology> A division of Gregarinae including those that have two or more internal divisions of the body. Origin: NL. See Poly-, and Cystidea. Source: Websters Dictionary (01 Mar 1998) |
| polycystina | <zoology> A division of Radiolaria including numerous minute marine species. The skeleton is composed of silica, and is often very elegant in form and sculpture. Many have been found in the fossil state. Origin: NL. See Poly-, and Cyst. Source: Websters Dictionary (01 Mar 1998) |
| polycystine | <zoology> Pertaining to the Polycystina. One of the Polycystina. Source: Websters Dictionary (01 Mar 1998) |
| polycythaemia | <haematology> Increase in the haemoglobin content of the blood, either because of a reduction in plasma volume or an increase in red cell numbers. The latter may be a result of abnormal proliferation of red cell precursors (polycythaemia vera, Vaquez Osler disease). Origin: Gr. Haima = blood (18 Nov 1997) |
| polycythaemia rubra vera | <haematology> A condition characterised by enlargement of the spleen and the increased production of red blood cells by the bone marrow. Diagnosis is based on an increased number and volume of red cells. The total number of white blood cells and platelets may also be increased. Treatment will vary according to the age of the patient and severity of the disease. This condition carries an increased risk of developing acute leukaemia. The disease usually begins in late middle life and is slightly more common in males. (11 Nov 1997) |
| polycythaemia vera | <haematology> A condition characterised by enlargement of the spleen and the increased production of red blood cells by the bone marrow. Diagnosis is based on an increased number and volume of red cells. The total number of white blood cells and platelets may also be increased. Treatment will vary according to the age of the patient and severity of the disease. This condition carries an increased risk of developing acute leukaemia. The disease usually begins in late middle life and is slightly more common in males. (11 Nov 1997) |
| polycythemia | The opposite of anaemia. Too many red blood cells. Polycythemia formally exists when the haemoglobin, red blood cell count, and total rbc volume are all above normal. (12 Dec 1998) |
| polycythemia hypertonica | Polycythemia associated with hypertension, but without splenomegaly. Synonym: Gaisbock's syndrome. (05 Mar 2000) |
| polycythemia rubra | Overproduction (proliferation) of red blood cells due to bone marrow disease (myeloproferative disorder). Pv tends to evolve into acute leukaemia or a condition with the marrow replaced by scar tissue (myelofibrosis) (12 Dec 1998) |