[A case of psuedocyst of the pancreas suspected to lung abscess].

A 83-year-old man visited a physician because of appetite loss. The chest X-ray film showed a cavity with air-fluids sign in the left lower lung field. He was admitted to our hospital for diagnosis of the cavity lesion on a suspicion of pulmonary abscess and pulmonary tuberculosis. Amylase in fluid aspirated from the cavity was elevated to 17930 IU/l. Pseudocyst of the pancreas was diagnosed. Pseudocyst of the pancreas was considered as one of the differential diagnosis of cavities on chest X-ray film.