[Squamous cell carcinoma of the breast: a case study conducted in Mauritania].

Primary epidermoid carcinoma (PEC) also known as squamous cell carcinoma of the breast is a rare tumor accounting for 0.1% to 2% of all breast cancers. It is a metaplastic carcinoma; its histogenesis and prognosis are controversial as well as its clinical and mammographic appearances which are not characteristic compared to other cancers.