Aim: Our purpose is to describe a new case of pure mucinous carcinoma in a man, to put emphasis on the rarity of this histologic subtype and the problems of management due to the fewer reported cases in the literature and to compare it with the female counterpart. Observation: We report the case of a 79- year-old man presenting as a nodular mass of the right breast. The clinical symptoms weren’t specific and the diagnosis was based on histological and immunohistochemical findings. Conclusion: Male breast carcinoma is rare compared to its female counterpart representing less than 2% of male breast carcinomas and 1% of all breast carcinomas. Pure mucinous carcinoma in male is an extremely rare histological subtype. It is a variety of carcinoma of the breast which is characterized by the production of an abundant extra-cellular and/or intra-cellular mucin. It has been regarded as one of the more benign forms of breast carcinomas. To our knowledge, about 30 cases of mucinous breast carcinoma in male have been reported in the English literature and only 10 cases of pure mucinous carcinoma have been described. In general, pure mucinous carcinomas have a favorable prognosis. Numerous studies have shown that breast carcinomas in male behave more aggressively compared to those in females. Further research is needed on male carcinomas as they are becoming more frequent
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