A resected case of pulmonary dirofilariasis with cavity formation

Abstract

A 59-year-old man was admitted to our hospital because of an abnormal shadow on a screening chest X-p. Chest CT showed a mass 1.0 cm in diameter in left lung S⁶, which had a cavity formation. We performed partial resection with video assisted thoracic surgey (VATS), because we could not distinguish the tumor from lung cancer. Intraoperativery, a frozen section of resection nodule was not recognized as containing malignant cells. We histologically diagnosed the tumor as pulmonary dirofilariasis with a finding of a body of Dirofilaria immitis after operation. Here we report a rare case of cavity formation in pulmonary dirofilariasis.