title: Primary omental yolk sac tumor.
abstract: Extra-ovarian yolk sac tumor arising in the omentum is extremely rare. As yolk sac tumor originated from the omentum has been rarely reported, its clinical information is very limited. The authors encountered a case of yolk sac tumor originated from the omentum, and reported the case herein. A 32-year-old woman was presented with developed low abdominal distension for a month. Magnetic resonance imaging findings were suggestive of ovarian malignancy with ascites and peritoneal seeding nodules. Explorative laparotomy was performed and then the findings from frozen biopsy of omentum were suggestive of poorly differentiated tumor though whether it was primary or metastatic was uncertain. Thus, staging laparotomy were performed. Histopathology confirmed that the tumor was a yolk sac tumor of omentum origin. Then, 6 cycles of postoperative adjuvant chemotherapy at intervals of 3 weeks were performed using bleomycin, etoposide, and cisplatin regimen. Four-year outpatient follow-up thereafter showed no relapse.
authors.affiliation: Department of Obstetrics and Gynecology, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Seon Hwa
authors.initials: SH
authors.lastname: Lim
authors.affiliation: Department of Pathology, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Yon Hee
authors.initials: YH
authors.lastname: Kim
authors.affiliation: Department of Obstetrics and Gynecology, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Ga Won
authors.initials: GW
authors.lastname: Yim
authors.affiliation: Department of Obstetrics and Gynecology, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Eun Ji
authors.initials: EJ
authors.lastname: Nam
authors.affiliation: Department of Obstetrics and Gynecology, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Young Tae
authors.initials: YT
authors.lastname: Kim
authors.affiliation: Department of Obstetrics and Gynecology, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Sunghoon
authors.initials: S
authors.lastname: Kim
keywords: Bleomycin, etoposide, and cisplatin regimen; Chemotherapy, Omentum; Yolk sac tumor