Primary Pulmonary Leiomyosarcoma

Leiomyosarcoma is a tumor of the smooth muscle cells which frequently originates in the uterus, retro-peritoneum, and within the abdomen. Although there are a large number of smooth muscle cells in the tracheobronchial tree, primary pulmonary muscle tumors rarely occur. A 48-year-old male patient with no symptoms was admitted to our department following the inadvertent detection of a lesion in his chest x-ray. Through thoracic computerized tomography, a 4x3 cm diameter mass lesion was located in the lower right lobe. In the positron emission tomography-computed tomography (PET/CT) scan with a fluorodeoxyglucose (FDG) tracer, low FDG uptake was observed in the lesion. Computer tomography-guided needle aspirations were carried out. In the absence of a histopathological diagnosis, surgery was planned for diagnosis and treatment. A lower lobe wedge resection was completed using video-assisted thoracic surgery (VATS). A diagnosis of primary pulmonary leiomyosarcoma was made based on postoperative pathology results.