[en] Spontaneous pneumothorax is a rare manifestation of lung cancer. Eight cases of pneumothorax found in 1648 patients with lung cancer from 1979-1990 are reported. Histopathologic types of cancer were adenocarcinoma in three cases, squamous cell carcinoma in two cases, bronchioloalveolar carcinoma in two cases, and metastatic renal cell carcinoma in one case. The primary tumor mass was not found even after thoracotomy in two cases. Spontaneous pneumothorax occurred on the ipsilateral side of the cancer. All the patients were more than 40 years old with a history of smoking 1-2 packs a day for 20 to 50 years, and had chronic lung diseases. The authors emphasize that bronchogenic carcinoma may be one of the causes of spontaneous pneumothorax in appropriate clinical settings

[en] Alveolar soft-part sarcoma usually arises from the soft tissue of the lower extremity, but may arise from the orbit, retroperitoneum and else where, in both children and adults. The tumors grow slowly, may invade the underlying bone, and eventually may metastasis widely through the blood stream. Recently, we experienced 5 cases of alveolar soft-part sarcoma originated from thigh, lower leg, inguinal region, retroperitoneum and orbit. The radiologic findings are soft tissue mass (2 cases) with underlying bony destruction (3 cases), lung metastasis (2 cases). Although rare, alveolar soft-part sarcoma should be included in the differential diagnosis of soft tissue tumor arising from the lower extremity