A case of umbilical endometriosis diagnosed by imprint cytology

We could rule out malignancy and suggest endometriosis based on imprint cytology findings for an umbilical specimen. A 44-year-old woman suffering abdominal discomfort for two weeks and cyclic umbilical pain for eight years had no history of previous abdominal surgery. Examination showed a firm round 3×2cm nodule at the umbilicus and 10cm uterine myoma. The umbilical mass was excised during hysterectomy. Imprint cytology yieled tubular clusters appearing to be normal proliferative-phase endornetriosis, and endometrial stromal cells.