胸腺癌と原発性肺癌の同時重複癌

Synchronous Thymic Carcinoma and Primary Lung Cancer

われわれは，比較的まれとされる胸腺癌と原発性肺癌の同時重複例に対して二期的に手術を施行した症例を経験したので報告する．

A 79-year-old woman visited a local doctor with a chief complaint of cough. A computed tomography （CT） scan revealed an anterior mediastinal tumor and 20 mm sized ground-glass nodule （GGN） in the right upper lobe. Bronchoscopy was performed, but no definitive diagnosis was made for GGN and follow-up observation was made with an image. The anterior mediastinal tumor was a solid tumor of 50 mm in size, and invasive thymoma was suspected. A total thymectomy with pericardial partial resection was performed through a median sternotomy. Histopathological diagnosis was squamous cell carcinoma, and no pericardial infiltration was observed. On the other hand, GGN of the right upper lobe during follow-up increased in size and thoracoscopic surgery was performed 3 months after surgery for thymic carcinoma. Adenocarcinoma was diagnosed by rapid diagnosis and the upper lobectomy with lymph node dissection were conducted. No signs of recurrence have been observed for 5 years after operation.