Squamous cell carcinoma of the ovary.

Benign cystic teratoma is a very common ovarian lesion; and it commonly occurs during a woman's reproductive years and most often is benign. In approximately 1% to 2% of cases, however, it can undergo a malignant transformation with a very poor prognosis. This is especially the case when disseminated disease is present. Usually the associated malignancy is squamous cell carcinoma, and radical surgery is recommended. An American Samoan woman was air-evacuated to Tripler Army Medical Center for further evaluation and therapy after having undergone an exploratory laparotomy and right ovarian cystectomy. Her pathology at the time of her initial procedure revealed a mature cystic teratoma with a malignant degenerative component. Her diagnostic evaluation upon arrival was unremarkable except for her physical exam and pelvic CT. She subsequently underwent a radical surgical procedure to include a surgical staging procedure, revealing disseminated squamous cell carcinoma with FIGO stage III disease. Whereas malignant transformation of a benign cystic teratoma is a rare occurrence, a high index of suspicion should be maintained whenever a preoperative diagnosis is encountered; a radical surgical approach with en bloc resection should be employed. Adjuvant therapy with radiation or chemotherapeutic agents in general has not been shown to improve the outcome, especially in disseminated disease.