[Primary leiomyosarcoma of the lung--a case report].

One case of primary leiomyosarcoma of the lung is presented. Leiomyosarcoma of the lung is a rare tumor. Of 83 cases reported in the literatures, 54 were recorded in detail. The incidence of the disease in the male is higher than that in the female. Children, adolescents and young adults may be involved. Its clinical and X-ray manifestations are similar to those of lung cancer. The diagnosis is established by pathologic examination. Direct visualization, biopsy and brushing during bronchoscopy are important methods for preoperative diagnosis. The chance of positive sputum cytology is very small. The pathologic features of this disease are emphasized. It is suggested that surgery be more effective for this tumor than the other lung cancers.