A pure primary mucinous carcinoma of male breast is very rare having incidence of <1% of male breast carcinomas in which axillary nodal metastasis is exceptional. Only few case reports have been described with a mucinous carcinoma in male breast with axillary lymph node metastasis. A pure form of mucinous carcinoma is diagnosed when more than 90% component is mucinous. A 65yr male patient presented with lump in left breast since 1 month. FNAC showed mucinous breast carcinoma with axillary lymph node metastasis. Patient underwent left modified radical mastectomy. Histopathology confirmed pure mucinous carcinoma with axillary lymph node metastasis. Immunohistochemistry showed tumor cells to be positive for ER and PR. Pure mucinous carcinomas are prognostically better than mixed mucinous and invasive carcinomas.
