This is a case of 53 years-old female, gravida 0 with positive vaginal, endocervical, and endometrial aspira tion cytology. Preoperative diagnosis was carcinoma of the endometrium. Postoperative examination of the removed uterus and both ovaries failed to reveal a ma lignancy, but on the basis of the positive cul-de-sac smear taken at the operation, malignancy of the fallo pian tube was suspected and very small lesion was fo und in the left fallopian tube. In this case, cul-de-sac smear was very helpful making the correct diagnosis.
