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Primary squamous cell carcinoma of the fallopian tube.

A 64-year-old postmenopausal woman presented with pain and a 6 cm×5 cm mass in the left pelvic. The cancer antigen (CA) 125 was 46.1 IU/L. An enlarged left fallopian tube with 5 cm of diameter was found during the operation. Frozen section diagnosis was squamous cell caicinoma of the left fallopian tube. Surgical staging procedures were performed. The pathologic examination revealed the moderately differentiated squamous cell carcinoma of the left fallopian tube with small part of transitional cell carcinoma. The transition from single layer tubal epithelium to squamous cell carcinoma is highly suggestive of a primary tumor. The patient died 9 months after diagnosis in spite of taking the chemotherapy.