胸壁原発多形型横紋筋肉腫の1例

Primary Pleomorphic Rhabdomyosarcoma of the Chest Wall；Report of a Case

はじめに　横紋筋肉腫は比較的小児に多い悪性腫瘍である．われわれは比較的まれと思われる成人の胸壁に発生した多形型横紋筋肉腫の1例を経験したので報告する．

The case was 70 years old, female. She visited a nearby hospital complaining of a mass in the right breast which was diagnosed as a chest wall tumor and referred to our department. A computed tomography （CT） scan revealed a 10 cm-sized contrast enhanced mass with bone destruction of the 3rd and 4th ribs. Invasion to the mammary gland tissue was not observed. A malignant tumor was suspected by percutaneous needle biopsy and the tumor was excised with the chest wall including the 3rd, 4th and 5th ribs. Histopathological diagnosis was a pleomorphic rhabdomyosarcoma. No signs of recurrence have been observed for 5 years after the operation.