How would you approach a completely resected DLBCL of the appendix if PET scan and bone marrow biopsy suggest no other disease?

Resected limited stage DLBCL has relatively high risk of recurrence. A recent prospective phase II trial was reported (Yoon et al. Oncotarget 2017) where patients received 3 cycles of RCHOP post resection and had an excellent 2 year PFS of 95%. Another study (Sehn et al. Annals of Oncology 2008 abst...