[A case of intrapulmonary neurilemmoma]

A 33-year-old man was admitted to our hospital because of an abnormal shadow on chest X-ray film. Chest X-ray film and chest CT showed a round tumor in the left infrahilar area. Bronchoscopic findings revealed narrowing of left B5 and B8, with extraluminal compression. A preoperative diagnosis was not obtained and tumor resection was performed. The tumor was located in the parenchyma of left S8. Histological examination showed nuclear palisading and loosely textured spindle cells within myxomatous tissue, compatible with neurilemoma. Intrapulmonary neurilemoma is extremely rare and only 23 cases have been previously reported in Japan.