[Primary pure carcinoid tumor of the breast: a case report. Review of the literature].

The authors present a case of primary pure carcinoid tumour of the breast and point out how rare it is and how they made their diagnosis mainly by histology. A review of the literature makes it possible to assess the prognosis which should be good and they also describe the anatomo-pathological findings in these tumours. Finally these tumours show a strange histogenesis which if it is understood makes it possible to understand certain processes of cellular differentiation in breast tissue.