| ovarian granulosa-theca cell tumour | <radiology> Any age, most benign, oestrogens may lead to isosexual precocious puberty (pathognomonic), large tumour with areas of cystic degeneration (12 Dec 1998) |
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| ovarian hormone | <protein> Polypeptide hormone produced by corpus luteum and found in the blood of pregnant animals. Acts, as its name suggests, to cause muscle relaxation during parturition. Human relaxin has an A chain of 24 amino acids and a B chain of 29. Has structural similarity to insulin. (18 Nov 1997) |
| ovarian ligament | <anatomy> A cordlike bundle of fibres passing to the side of the uterus from the lower end of the ovary, between the folds of the broad ligament (mesovarium). Synonym: ligamentum ovarii proprium, proper ligament of ovary. (05 Mar 2000) |
| ovarian plexus | An autonomic plexus derived from the aortic plexus and accompanying the ovarian artery to the ovary, broad ligament, and uterine tube. Synonym: plexus ovaricus. (05 Mar 2000) |
| ovarian pregnancy | Development of an impregnated ovum in an ovarian follicle. See: Spiegelberg's criteria. Synonym: oocyesis, ovariocyesis. (05 Mar 2000) |
| ovarian stromal tumours | <radiology> Age 20 - 50 yrs, 20% of all ovarian tumours, fibroma / fibrosarcoma, granulosa-theca cell tumour, with or without oestrogens most likely to be precocious puberty, endometrial hyperplasia/carcinoma, fibrocystic breast disease, Sertoli-Leydig cell tumour, aka: arrhenoblastoma, with or without androgens most likely to be masculinization, may be mixed type (12 Dec 1998) |
| ovarian teratoma | See: Ovary, dermoid cyst of the. (12 Dec 1998) |
| ovarian tubular adenoma | <oncology, tumour> A type of ovarian tumour whose sells secrete a male sex hormone (testosterone) causing virilisation in women. (27 Sep 1997) |
| ovarian tumour | <gynaecology, oncology> A malignant tumour of the ovary is the leading cause of death from gynaecologic malignancies. Often diagnosed in later stages, symptoms include abdominal pain, increasing abdominal girth and abnormal uterine bleeding. Birth control pill use is thought to reduce the risk of ovarian cancer. (05 Jan 1998) |
| ovarian tumours | <radiology> Before age 45 most likely to be 98% benign, 2/3 of cancers in ages 40 - 65 yrs see also: ovarian stromal tumours (12 Dec 1998) |
| ovarian varicocele | A varicose condition of the pampiniform plexus in the broad ligament of the uterus. Synonym: tubo-ovarian varicocele, utero-ovarian varicocele. (05 Mar 2000) |
| ovarian veins | See: right ovarian vein, left ovarian vein. (05 Mar 2000) |
| ovarian vein syndrome | <syndrome> Ureteral obstruction due to compression by enlarged ovarian vein, usually right side and during pregnancy. (05 Mar 2000) |
| ovarian wedge resection | <gynaecology, procedure> The surgical removal of a portion of a polycystic ovary to induce ovulation. (05 Jan 1998) |
| teratoma, ovarian | Tumour that develops from a totipotential germ cell (a primary oocyte) retained within the egg sac (ovary). Being totipotential, that cell can give rise to all orders of cells necessary to form mature tissues and often recognizable structures such as hair, bone and sebaceous (oily) material, neural tissue and teeth. These tumours may occur at any age but the prime age of detection is in the childbearing years. The average age is 30. Up to 15% of women with ovarian teratomas have them in both ovaries. The tumours can range in size from a centimeter (less than a half inch) up to 45 cm (17 inches) in diameter. They can cause the ovary to twist (torsion) and imperil its blood supply. Although the large majority (about 98%) of ovarian teratomas are benign, the remaining fraction (about 2%) becomes malignant. The larger the ovarian teratoma, the greater the risk of rupture with spillage of the greasy contents which can create problems with adhesions, pain etc. Removal is usually the treatment of choice by laparotomy (surgery) or laparoscopy (with a scope). Ovarian teratomas are also called dermoid cysts of the ovary and referred to simply as dermoids. (12 Dec 1998) |