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Metachronous breast neoplasms: squamous cell carcinoma and lobular carcinoma in situ within a fibroadenoma

Breast squamous cell carcinoma are rare, occurring in less than 0.1% of all breast carcinomas. This report describes the oncological conduct performed on a patient with a triple negative squamous cell carcinoma in the upper outer quadrant of the right breast. The same patient presented a lobular carcinoma in situ within a fibroadenoma of the contralateral breast, during the follow up period. The association of these two diseases in the same patient has not yet been described in the literature.