[Erosive adenomatosis of the nipple]

First rule out galactophoric carcinoma underlying all the erosions of the nipple or a breast tumor. A 52-year-old woman consulted for a right breast tumor that had developing for more than four years due to a serious nipple flow. Physical examination disclosed an ulcer tumor of the nipple and the superior quadrant of the areole. Mammography and mammary ultrasound found a mass texture suspected of malignity. Needle aspiration produced a white fluid. Wide tumor resection was performed. The histological analysis led to the diagnosis of erosive nipple adenomatosis. The patient had recovered at 34 months. Erosive adenomatosis of the nipple is a benign tumor which developing within the lactic nipple. Clinically, the differential diagnosis is breast carcinoma, Paget disease and galactophoric dilatation. Pathology is required for certain diagnosis. The treatment is usually surgical. Erosive adenomatosis of the nipple is very rare and should be suspected in patients with nipple erosions or a nipple tumor. The prognosis is excellent.