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J Surg Case Rep. 2018 Oct 31;2018(10):rjy279. doi: 10.1093/jscr/rjy279. eCollection 2018 Oct.

Resection of a mature cystic teratoma of the liver harboring a carcinoid tumor.

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General Surgery Residency Program, St. Vincent Hospital Indianapolis, St. Vincent Ortho Center 2001 West 86th Street, Indianapolis, Indiana, USA.
St. Vincent Hospital Indianapolis/North Indy Surgical Group, Indianapolis, IN, USA.
St. Vincent Hospital Indianapolis, Department of Pathology/AmeriPath Anatomic Pathology Services, Indianapolis, IN, USA.
General Surgery Residency Program, St. Vincent Hospital Indianapolis, Indianapolis, IN, USA.
St. Vincent Hospital Indianapolis, Department of Hematology/Oncology, Indianapolis, IN, USA.


Cystic teratomas are rare pluripotent embryonic tumors which most commonly originate in gonadal organs. Extra-gonadal cystic teratomas are exceedingly uncommon, accounting for only 1% of all cystic teratomas, and have been reported in unusual locations including the kidney, mediastinum and liver. These extra-ovarian cystic teratomas have also been known to harbor other neoplasms including carcinoid tumors. In this report, we describe a unique case of a hepatic cystic teratoma occurring as a combined tumor with a carcinoid in a young female. The patient underwent elective laparoscopic resection of her tumor after extensive radiographic and endoscopic work-up for chronic, non-localizable abdominal pain. We believe the carcinoid tumor arose de novofrom committed differentiation of a cell line within the teratoma, and not metastatic spread.

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