Efficacy of Consolidative Involved-site Radiotherapy for Patients With Limited-stage Diffuse Large B-cell Lymphoma

"6 cycles modern CHOP chemotherapy. Involved-site radiotherapy (ISRT) is based on defining the site of gross disease before chemotherapy, the GTV and using a CT-based volume with an expansion to form a CTV in the cranio-caudal direction.~The general dose had been guided that 30-36Gy in 15\~18 fractions of 2 Gy 5 days per week was managed for patients with complete response (CR) after chemotherapy and 40-50Gy in 20\~25 fractions of 2 Gy 5 days per week for partial response (PR)."

"6 cycles modern CHOP chemotherapy. Radiotherapy field of IFRT defined by CALGB is encompassed the prechemotherapy gross tumor.~The general dose had been guided that 30-36Gy in 15\~18 fractions of 2 Gy 5 days per week was managed for patients with complete response (CR) after chemotherapy and 40-50Gy in 15\~18 fractions of 2 Gy 5 days per week for partial response (PR)."

Patients in both arms will be given cyclophpsphamide chemotherapy.

Patients in both arms will be given doxorubicin chemotherapy.

Patients in both arms will be given vincristine chemotherapy.

Patients in both arms will be given prednisone chemotherapy.