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Metastatic Breast Cancer Presenting As an Ovarian Cyst: Diagnosis By Fine Needle Aspiration Cytology

A fifty‐year‐old woman with a history of breast cancer presented with a clinically benign ovarian cyst. Laparoscopic aspiration of cyst fluid was performed and the cytology was suspicious of epithelial neoplasia. At subsequent hysterectomy and bilateral salpingo‐oopherectomy, the specimen showed extensive metastatic breast carcinoma. Although the cytological examination of fluid from ovarian cysts is often unrewarding, this case shows that metastatic carcinoma may occasionally be diagnosed in this fashion.