[Perianal basal cell carcinoma]. / Carcinome basocellulaire périanal.

INTRODUCTION: The perianal localisation of a basal cell carcinoma is exceptional. Its long term progression and the modalities for its treatment should be known. OBSERVATION: A 66 Year-old man was referred for a non-regressive haemorrhoidal thrombosis. He presented with a painless but hemorrhagic lesion of the anal-cutaneous junction that had not progressed much over 5 Years but which did not heal. Following exeresis and biopsy, the anatomopathological exploration concluded in an ulcerous-nodular basal cell carcinoma. COMMENTS: The treatment of perianal basal cell carcinomas consists in the local exeresis of the tumour. Of good prognosis, the possibility of a local relapse however requires strict follow-up.