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Obstet Gynecol Sci > Volume 55(1); 2012 > Article
Korean Journal of Obstetrics & Gynecology 2012;55(1):47-50.
DOI: https://doi.org/10.5468/KJOG.2012.55.1.47    Published online January 1, 2012.
Primary yolk sac tumor of omentum: A case report.
Do Young Kwon, Yu Suk Yu, Su Hyun Baek, Seok Cheol Choi, Sang Young Ryu
Department of Obstetrics and Gynecology, Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences, Seoul, Korea. ryu@kcch.re.kr
Yolk sac tumor (YST) is one of the rare malignant germ cell tumor and usually occurs in gonad. Extragondal sites of YSTs are reported in mediastinum, vagina, brain, and retroperitoneum but are extremely rarely in omentum. The clinicopathologic feature of primary omental YST is not well known and there are only 5 cases reported currently. Recently we experienced a primary YST of omentum in 27-year-old woman who was performed exploratory laparotomy due to abdominal distension and pain. She has remained free of diseases for 2 years with normal menstruation after the fertility-saving surgery and postoperative adjuvant chemotherapy with bleomycin, etoposide, cisplatin regimen. The subject of primary YST of omentum is reviewed, and the possible histogenesis of the tumor is discussed.
Key Words: Yolk sac tumor, Germ cell tumor, Omentum

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