Diagnostic features and treatment of the Askin tumor--malignant small cell tumor of the thoraco-pulmonary region: a case report.

The Askin tumor is one of a group of small round cell tumors and is found mainly in the thoraco-pulmonary region of children and young adults. The treatment of the patient and the differentiation of this tumor from other small round cell tumors, especially Ewing's sarcoma and neuroblastoma by light microscopy, immunohistochemical methods, and electron microscopy is discussed.