[Alveolar soft part sarcoma: a clinicopathologic and immunohistochemical study of 13 cases].

Thirteen cases of alveolar soft part sarcoma were studied clinicopathologically and by the PAP technique antisera against desmin, myoglobin, S-100 protein, neuron-specific enolase (NSE). We suggested, light microscopically, the main points for diagnosis and differential diagnosis of alveolar soft part sarcoma. Immunohistochemically, the tumor cells reacted positively for desmin (five cases), myoglobin (three cases) and NSE (four cases). No immunoreactivity for S-100 protein was observed. Similar results had been reported by others. No definite conclusion about histogenesis of alveolar soft part sarcoma could be drawn from the small number of cases in this study.