Merkel Cell Carcinoma of the Breast

most common on sun-exposed areas such as the head (mainly the eyelids and cheeks) and neck, followed by the limbs, buttocks, and trunk. Cases have also been described in the mucosas, including the bottom lip, oral and genital mucosas, and the anal region.7 Lesions localized to the breast are even less frequent; we have found several cases of metastasis of MCC to that site,8 but only 4 primary cases,3-6 1 of which was in a man.3 Merkel Cell Carcinoma of the Breast