[Appropriate surgical approach to cystic thymic lesions].

We retrospectively analyzed surgical approach to cystic thymic lesions based on 25 cases. We classified to 4 groups as follows, 12 thin-wall solitary cysts with low uniform density, 7 solitary cysts with ununiform density, 5 cysts with tumor lesions and 1 multiple cysts. Preoperative image diagnoses were 10 thymic cysts, 7 cystic thymomas, 4 mature teratomas, and 1 each of multilocular thymic cyst and thymic lymphoma.

Cytologically malignant margin without continuous pulmonary tumor lesion: cases of wedge resection, segmentectomy and lobectomy.

The surgical margin is usually investigated during the operation using a pathological method, though cytological methods are also used to identify remaining malignant cells. We reviewed cases of pulmonary resection for a malignant tumor. At our institution, an on-site surgical margin examination using a cytological method is mandated for cases of wedge resection and segmentectomy, and an option in lobectomy cases.