Abstract
A 13-year-old Japanese boy complaining of exertional chest pain was admitted to Kyoto University hospital . On chest CT, a fat density tumor waslocated in the left anterior chest wall with extension to the left pleural space . Chest MM revealed infiltration of the tumor into the muscular layers of the chest wall . Preoperative diagnosis was intrathoraciclipoma with possible malignant potential. The patient underwent en-bloc resection of the tumor and chest wall. Histological diagnosis was infiltrating intramuscular lipoma of the chest wall . The patient is alive and well with no evidence of recurrence one year after surgery.
