[Small cell lung cancer that appeared as a strange shape on chest X-ray films].

A 70-year-old man was admitted for diagnosis of an abnormal shadow on chest X-ray film. Chest X-ray films and chest tomograms showed a club-like shadow close to the pulmonary artery. The tumor was diagnosed as a small cell lung cancer, after transbronchial biopsy. The patient underwent chemotherapy and radiation therapy. This patient had small cell lung cancer that appeared on chest X-ray films to have a strange shape.