多発胸腺癌

Resection of Multiple Thymic Carcinomas of the Thymus

胸腺癌は，発見時には進行しており外科的切除が困難な症例が多い．われわれは，多発胸腺腫瘍に対して胸腺摘除術を施行し，病理組織学的にすべて胸腺癌と診断され，完全切除を得た1例を経験したので報告する．

The patient was a 70-year-old woman who was found to have 2 mediastinal tumors on chest computed tomography （CT）. One was located in the anterior mediastinum, and the other was in the upper mediastinum. Based on previous imaging studies, it was revealed that the 2 tumors had been increasing in size for 5 years. Thymectomy via median sternotomy was performed. Histopathologically, 3 tumors revealed to be in the thymus without direct invasion of the adjacent organs. All were thymic squamous cell carcinomas of 3.0×1.8×1.6 cm, 2.5×1.6×1.2 cm and 0.7 cm in size. No lymphatic invasion was observed and all tumors were pathologically stage I. Thus, we considered the 3 tumors were multi-centric primary tumors.