Gastrointestinal adenocarcinoma arising in a mature cystic teratoma of the ovary.
BACKGROUND
Mature cystic teratoma of the ovary (MCTO) is the most common ovarian germ cell neoplasm and is usually diagnosed in early adulthood. Malignant transformation is rare, occurring in approximately 2% of all cases. Though malignant transformation can occur from any of the embryonic germ layers, the most common malignancy arising in these otherwise benign tumors is squamous cell carcinoma.


METHODS
We present a patient with a MCTO where malignant transformation of gastrointestinal epithelium resulted in moderately differentiated adenocarcinoma. After 3 years of follow-up, she remains free of disease.


CONCLUSIONS
Although gastrointestinal epithelium is often found in MCTOs, adenocarcinoma arising from this cell type is uncommon. This is the third reported case of adenocarcinoma arising in gastrointestinal epithelium of a MCTO.
Gynecology Service, Department of Surgery, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, NY 10021, USA. gynbreast@nskcc.org
Douglas A
DA
Levine
Jeannine A
JA
Villella
Elizabeth A
EA
Poynor
Robert A
RA
Soslow
D000230:Adenocarcinoma / Q000473:pathology*; D000328:Adult; D002471:Cell Transformation, Neoplastic / Q000473:pathology*; D005260:Female; D005770:Gastrointestinal Neoplasms / Q000473:pathology*; D006801:Humans; D010051:Ovarian Neoplasms / Q000473:pathology*; D013724:Teratoma / Q000473:pathology*