title: [Epithelioise sarcoma. A myofibroblastoma tumor].
abstract: A case of epithelioid sarcoma in a 48 year old man is described by the authors. The ultrastructural study showed the presence of abundant cellular elements showing some features closely similar to those of the so-called myofibroblasts. These were: folds in the nuclear membrane, abundant rough endoplasmic reticulum, thick bundles of microfilaments resembling those of the smooth muscle, junctional complexes and degenerative changes (lipid droplets and autophagic vacuoles). These findings suggest the possibility that the epithelioid sarcoma could be a neoplasia originating from the myofibroblasts.
mesh_terms: D003937:Diagnosis, Differential; D005350:Fibroma / Q000473:pathology; D006801:Humans; D007871:Leg Ulcer / Q000473:pathology; D008297:Male; D008875:Middle Aged; D012509:Sarcoma / Q000473:pathology; D012878:Skin Neoplasms / Q000473:pathology*
vernacular_title: Sarcoma epitelioide. Un tumor de miofibroblastos