[Surgical treatment of giant thymoma in a patient with myasthenia gravis].

We report a case report of giant thymoma (17 cm×14 cm×4 cm) in a 32-year-old male patient with myasthenia gravis. Examinations revealed that the tumor invaded the mediastinum, blood vessels and pericardium, and was histologically classified as WHO type B1 and Masaoka stage III. The patient developed myasthenia gravis crisis after radical resection of the thymoma and appropriate treatments with tracheotomy were administered. The patient recovered and was discharged after a hospital stay for 252 days with a mechanical ventilation time of 102 days.