title: Uterus-like mass replacing ovary: report of a new entity.
abstract: A unique, uterus-like ovarian mass with central endometriosis was studied. A 31-year-old woman with a ten-year history of endometriosis of the left ovary had surgically excised a left ovarian mass with a central cavity that was lined by endometriotic tissue, which was surrounded in turn by a very thick wall of smooth-muscle cells that contained a scanty amount of collagen. The general architecture of the mass simulated that of a uterus. The tentative hypothesis is that the present mass was the end result of an intensive and complete transition of the ovarian stromal cells into smooth-muscle fibers.
mesh_terms: D000328:Adult; D005260:Female; D005347:Fibroblasts / Q000473:pathology; D006801:Humans; D009130:Muscle, Smooth / Q000473:pathology; D010051:Ovarian Neoplasms / Q000473:pathology* / Q000648:ultrastructure; D014599:Uterus