2014 Volume 28 Issue 1 Pages 75-79
A 46-year-old man was pointed out as showing a slow-growing cavitary lesion in the left upper lung field in an annual chest radiograph for the screening of pneumoconiosis. Chest CT showed a cavitary nodule in the left upper lobe. A definitive diagnosis could not be made by bronchoscopic examination. We performed thoracoscopic partial resection of the left upper lobe for the differential diagnosis. The histopathological findings of the resected specimen showed pulmonary siderosis. There was no evidence of malignancy. Considering the patient's occupation, we finally established a diagnosis of welder's lung. Welder's lung is a benign disease sometimes requiring a differential diagnosis from lung cancer.
