What dose and volume would you treat in a patient with diffuse large B-cell lymphoma confined to the stomach after complete response to R-CHOP?  

In a patient with stage IE gastric DLBCL in a complete response (Deauville 1-3) after R-CHOP, I would consolidate with 30 Gy of RT. The volume would depend upon the size of the original tumor and how defined the original disease was on PET-CT and upper endoscopy. In a patient with a smaller lesion i...