Purpose: The aim of the study was to investigate the management and prognosis of Pure primary squamous cell carcinoma (PPSCC) of the breast.
Materials And Methods: This study is a multicentre retrospective cohort from three French tertiary referral hospitals (Rennes, Orléans and Tours) including all women treated for a PPSCC of the breast defined by squamous cells that could contain a minority of sarcomatoid component. We excluded carcinomas with a ductual component.