Cohort of Peripheral T Cell Lymphoma

Inclusion Criteria: 1. Treatment naive peripheral T cell lymphoma Subtypes are as followings: Anaplastic large cell lymphoma angioimmunoblastic T cell lymphoma Peripheral T cell lymphoma-NOS Enteropathy-associated T cell lymphoma Hepatosplenic T-cell lymphoma Subcutaneous panniculitis-like T-cell lymphoma Primary cutaneous gamma-delta T-cell lymphoma Primary cutaneous CD8+ aggressive epidermotropic lymphoma 2. Scheduled to receive chemotherapy of curative intent 3. 19 years old or over 4. Expected survival is more than 6 months 5. Informed consent Exclusion Criteria: 1. Other histology than those described above * Extranodal NK/T cell lymphoma * Other than peripheral T cell lymphoma 2. Other combined malignancy 3. Previous history of chemotherapy or radiation therapy 4. No informed consent