Inclusion Criteria:

• histologically or cytologically confirmed invasive thymoma or thymic carcinoma
• unresectable tumor: by either local invasion, distant metastasis, or recurred (assessed by investigator)
• no previous systemic treatment for invasive thymoma or thymic carcinoma
• at least one measurable lesion by RECIST criteria
• 18 years old or older
• ECOG performance status 0, 1, 2
• adequate lab. findings neutrophil ≥ 1.5 x 10^9/L platelet ≥ 75 x 10^9/L hemoglobin ≥ 9.0 g/dL bilirubin ≤ 1.5 x upper normal limit AST, ALT ≤ 2.5 x upper normal limit Alkaline phosphatase ≤ 2.5 x upper normal limit (if liver metastasis, ≤ 5 x upper normal limit) serum creatinine ≤ 1.0 x upper normal limit if serum creatinine > 1.0 x upper normal limit, creatinine clearance ≥ 60 mL/min
• patient who agree to written, informed consent

Exclusion Criteria:

• other malignancy (exception: non-melanoma skin cancer, cervical carcinoma in situ, cancer without evidence more than 5 years since curative resection)
• active bacterial infection
• history of clinical trial with investigational drug within 30 days
• radiotherapy to thoracic or mediastinal area (other area radiotherapy is permitted)
• pregnant, or lactating women
• patient with organ transplantation
• peripheral neuropathy, grade 2 or greater
• severe, medical condition unstable cardiac disease despite of adequate management myocardial infarction within 6 months active ulcer disease refractory to medication chronic obstructive lung disease requiring admission treatment within 1 year
• uncontrolled seizure, cerebral nervous system disorder, psychiatric problem which decrease treatment compliance