TRANSLOCATION (X-18) IN PRIMARY SYNOVIAL SARCOMA OF THE LUNG

Primary sarcomas of the lung are extremely rare. Among the most common to occur in this location ore leiomyosarcoma, fibrosarcoma, and heman giopericytoma. Many difficulties are encountered when establishing the se sarcoma diagnoses, or one of another pathologic type, because of ov erlapping histologic features and morphologic similarities between pri mary and metastatic lesions. In this study, the diagnosis of a primary monophasic synovial sarcoma of the lung was aided by the observation of the X;18 translocation characteristic of this neoplasm. To the best of our knowledge, this is the first cytogenetic report of a primary p ulmonary synovial sarcoma.