[Breast sarcoidosis: 2 case reports and a review of 19 literature]

Case 1. A 40-year-old Japanese female with a 11 years history of sarcoidosis. Biopsy of a 0.5 cm-sized right breast nodule showed sarcoid granuloma. About two years later she had had bloody galactorrhoea and biopsy of an apparently normal site of the breast revealed periductal sarcoid granuloma and duct papillomatosis. Case 2. A 63-year-old Japanese female in whom biopsy of a 1 cm-sized right breast nodule revealed sarcoid granuloma. BHL, lung, eyes, muscle, lymph nodes and skin lesions were subsequently detected and the last two were histologically confirmed as sarcoidosis. After nine months all lesions disappeared. Some problems presented in the literature such as periductal sarcoid granuloma formation, latent sarcoidosis in the grossly normal breast and coexistent breast cancer are discussed briefly.