A CASE OF MALIGNANT MUCOCELE-LIKE TUMOR OF THE BREAST

Abstract

A malignant mucocele-like tumor of the breast, which is a rare entity, is entity, is reported. A 41-year-old woman had noticed a lump of the right breast one week before she visited the hospital. Physical examination revealed a 1.6×1.2cm elastic hard, smooth, surfaced, and well movable nodule in the upper lateral quadrant of the right breast. A distance of nipple and nodules was 2cm. Regional lymph node was not palpable. Mammography revealed a homogeneous mass lesion with halo and smooth margin. Calcification and spicula were not detected. Echography revealed a cyst-like hypoechoic lesion in the mammary gland, which was smooth margin but irregular shaped as small papillary lesions and septum. On aspiration cytology, a small quantity of gelly like substance was aspirated. Cytological diagnosis was class IIIb, and mucinous carcinoma was suspected. Histological examination revealed mucinous cysts with extrvaseted mucin, which were lined by low columner epithelium with low papillary projections and bridge formation. Histological diagnosis was made as malignant mucocele-like tumor of the breast.