[A case of colon cancer with tension pneumothorax and empyema as a consequence of colo-pleural fistula].

: A 63-year-old man was admitted to our hospital with fever and chest pain. Chest radiography revealed left pleural effusion with left pneumothorax and small nodular shadows in the right lung field. On CT of the chest and abdomen, multiple nodules were seen in both lung fields, and masses appeared in the liver and spleen. Fiberoptic colonoscopy showed obstruction at the end of the transverse colon. Biopsy of this obstruction proved it to be cancer. In this patient, a colo-pleural fistula was also diagnosed using thoracoscopy under local anesthesia and from the inflow of contrast medium from the colon into the thoracic cavity seen in abdominal radiographs. This was a rare case of a colo-pleural fistula without diaphragmatic deficiencies. Medical thoracoscopy is useful for the diagnosis of complicated pleural effusions as was seen in this case.