Primary Pulmonary Leiomyosarcoma: A Rare Presentation:

An unusual case of primary leiomyosarcoma presenting as a cystic mass is reported. An 86-year-old man underwent resection of a large cystic mass measuring 15 cm in diameter, arising from the left lower lobe of the lung. Histology of the resected specimen showed primary pulmonary leiomyosarcoma. The patient made a good recovery.