[Congenital vascular tumor of the larynx: cellular hemangioma].

A 9 year old child was operated upon for a very vascular tumor of the right piriform sinus, signs of which had been present at birth. Histopathologic and ultrastructural examinations showed the lesion to be composed of both endothelial and pericytic elements, suggesting the diagnosis of a cellular hemangioma. This tumoral variety, particularly rare in the larynx, has been distinguished from the group of hemangiopericytomas described by Stout and Murray, not only by its usual congenital character and course but also by its specific structure.