title: [Malignant hemangiopericytoma. Apropos of the ultrastructural and histoenzymological analysis of a case].
abstract: The histoenzymological and ultrastructural study of a haemangipericytoma with the clinical and histological characteristics of malignancy led to the identification within the tumour, in addition to pericytes and more differentiated cells, fibroblastic or muscular, of younger cells. The latter, arranged in cords undergo multiple appearances of transformation to result in a double maturation, at one and the same time pericytic and angio-endothelial, rarely seen up to the present in haemangipericytomas.
mesh_terms: D000135:Acid Phosphatase / Q000378:metabolism*; D000328:Adult; D000469:Alkaline Phosphatase / Q000378:metabolism*; D006393:Hemangiopericytoma / Q000201:enzymology / Q000648:ultrastructure; D006801:Humans; D008297:Male; D010088:Oxidoreductases / Q000378:metabolism*; D010386:Pelvic Neoplasms / Q000201:enzymology / Q000648:ultrastructure; D010447:Peptide Hydrolases / Q000378:metabolism*; D010534:Peritoneal Neoplasms / Q000201:enzymology / Q000648:ultrastructure
chemical_list: D010088:Oxidoreductases; D000469:Alkaline Phosphatase; D000135:Acid Phosphatase; D010447:Peptide Hydrolases
vernacular_title: Hémangiopéricytome malin. A propos de l'analyse ultrastructurale et histoenzymologique d'une observation.