Glucocorticoids Combined With Concurrent Chemoradiotherapy for Unresectable Thymoma

Inclusion Criteria: * Histologically confirmed type AB or B1-3 thymoma. * Measurable Disease: Patients must have measurable disease as defined by RECIST (Response Evaluation Criteria in Solid Tumors). * Unresectable or recurrent thymoma, with the tumor confined to the chest and neck area. * Between the ages of 18 and 70 years, regardless of sex. * Eastern Cooperative Oncology Group performance status of 0 or 1. * No prior chest radiation. * Adequate organ Functions. * Written informed consent obtained. Exclusion Criteria: * Contraindications to Methylprednisolone. * History of or Concurrent Malignancy. * Active infection, myocardial infarction within the last 6 months or symptomatic heart disease. * Pregnant or Lactating Women. * Bleeding Disorders. * Recent Participation in Other Clinical Trials. * Drug Abuse or Severe Alcoholism. * Uncontrolled Seizures or Mental Disorders. * Severe Allergies or Specific Sensitivities.