[A case of a primary neurofibroma of the left ventricle].

A neurogenic tumor of the heart is extremely rare, and previously only 8 cases of malignant schwannoma and 3 cases of neurilemmoma have been reported. The patient of this case was a seven year old boy and referred to our hospital by his school doctor for investigation of IRBBB on screening ECG. The chest-X-ray showed a bulging contour on left ventricular apex. Echocardiography and angiography showed a 4 x 4 cm solid mass in the anterior-lateral wall of the left ventricle near the apex. Thoracotomy was performed and during cardiopulmonary bypass the tumor was successfully removed without involvement of the endocardium. It was not encapsulated. The pathohistological findings of the specimen were compatible with neurofibroma, and S-100 protein was demonstrated immunohistochemically.