title: Bowel loop in an ovarian tumor: grossly visible, completely developed intestinal loop in mature cystic teratoma of malignant mixed germ cell tumor.
abstract: Although a gastrointestinal-type epithelium is observed in 7-13% of mature cystic teratoma cases, the occurrence of a grossly visible, organized gastrointestinal loop formation is very rare. Presented here is the case of a 14-year-old girl with malignant mixed germ cell tumor in the ovaries. In her left ovary a grossly visible, intestinal loop, 9 cm long, with hanging mesentery attached to the cystic wall of a mature cystic teratoma associated with a yolk sac tumor was observed, and in her right ovary another mature cystic teratoma was observed. Microscopy of the intestinal loop indicated a well-organized, intact layer of small intestinal wall. The yolk sac tumor predominantly had a poly-vitelline pattern. Previously, gastrointestinal wall or epithelium that was identified on microscopy has been reported. To the authors' knowledge this is the first case report of the formation of a grossly visible, completely developed intestinal loop in a malignant mixed germ cell tumor.
authors: Department of Pathology, Kangdong Sacred-Heart Hospital, Hallym University Medical College, Seoul, Korea.
authors: Mi Jung
authors: MJ
authors: Kwon
authors: Eun Sook
authors: ES
authors: Nam
authors: Seong Jin
authors: SJ
authors: Cho
authors: Hyung Sik
authors: HS
authors: Shin
authors: Yeon Sik
authors: YS
authors: Na
authors: Jae Hyuk
authors: JH
authors: Chang
authors: In Sun
authors: IS
authors: Kim
mesh_terms: D000293:Adolescent; D018240:Endodermal Sinus Tumor / Q000473:pathology*; D005260:Female; D006801:Humans; D007420:Intestine, Large / Q000473:pathology*; D009378:Neoplasms, Multiple Primary / Q000473:pathology*; D010051:Ovarian Neoplasms / Q000473:pathology*; D013724:Teratoma / Q000473:pathology*