[Surgical treatment of 219 cases of primary tumor and cyst of the mediastinum].

Two hundred and nineteen patients with primary tumor and cyst in the mediastinum were retrospectively analysed. All patients received surgical treatment and pathologic examination. Results showed that: (1) the commonest mediastinal tumors was the thymoma (42.0%) (2) The second teratoma (20.1%). The incidence of neurogenic tumors was 16.4%. The over-all incidence of these three tumors was 78.5%. A total excision of the tumor was performed in 198 patients; incomplete excision was performed in 18 patients; 3 patients underwent biopsy only. The anatomic locations, clinical manifestations, complication and mortality of surgical treatment of these tumors were analysed.