左主気管支に伸展した右中葉肺癌肉腫

Pulmonary Carcinosarcoma of Right Middle Lobe Extending to the Left Main Bronchus

癌肉腫は，癌腫と異所性成分を含む肉腫からなる悪性腫瘍として定義される比較的まれな腫瘍である．われわれは，右中葉から対側の主気管支まで伸展した肺癌肉腫の1例を経験したので，文献的考察を加えて報告する．

A 72-year-old man with a lung tumor admitted to our hospital for surgical treatment. Computed tomography （CT） revealed a mass in the right middle lobe extending to the truncus intermedius and the left main bronchus. The enucleation of the tumor in the left main bronchus was performed with a bronchoscope followed by right middle and lower lobectomy. From the bronchial stump, the residual tumor was observed in the bronchus and was able to be pulled out since there was no invasion of the tumor into the bronchial wall. Pathological diagnosis was pulmonary carcinosarcoma.