An intracystic papillary carcinoma of the breast.

Intracystic carcinoma of the breast is a rare form of breast carcinoma. Among allmalignant breast tumors, this lesion has an incidence of 0.2-0.5%. These neoplasms have certain characteristic imaging findings which help to differentiate these lesions from other focal breast abnormalities.This report is on the case of a 48-year-old woman with a palpable, painless lump in her right breast. Mammography demonstrated an oval well-circumscribed mass without calcification. Breast ultrasonography showed a cystic lesion with an intracystic solid component projecting from its posterior wall. Cyst aspiration revealed a hemorrhagic fluid and a suspicious cytology. Excisional biopsy revealed papillary carcinoma suggesting of intracystic papillary carcinoma.