Asymptomatic patients with early stage follicular lymphoma (FL) may initially be observed without treatment as there is no evidence that early treatment improves survival. There is no universally accepted first-line therapy for advanced FL and treatment options need to be made on an individual patient basis. R-CVP chemotherapy is used for patients with advanced (stage III or IV) FL who require treatment because of bulky or rapidly progressive disease, bone marrow failure or life-threatening organ involvement. R-CVP has been shown to improve overall response rate (ORR), time to treatment failure, progression free survival and 4 year overall survival (OS).r It also appears to favourably alter disease response and control when added to other similar chemotherapy protocols.
Marcus et alr randomised previously untreated patients with stage III to IV, grade 1 to 2 (with the occasional grade 3) FL to receive either 8 cycles of CVP or 8 cycles of CVP plus rituximab. This multi-national study reported 321 randomised patients of mean ages 52/53. In the patients receiving CVP the ORR was 57% with complete response rate of 10%. This compared to patients receiving rituximab-CVP who had an ORR of 81% and complete response rate of 41%. At a median follow-up of 30 months the patients receiving CVP had a median time to progression of 15 months versus 32 months for R-CVP. Kaplan-Meier estimates for OS at 30 months was 85% for CVP and 89% for R-CVP (p=.22).r A follow up of this cohort found that "all outcome measures, including OS, benefit from adding R to CVP".r
The FOLL05 trial comparing R-CVP vs R-CHOP vs R-FM noted similar 8-year OS rates of 85% (95% CI, 77% to 91%), 83% (95% CI, 75% to 89%), and 79% (95% CI, 71% to 85%) respectively. Patients initially treated with R-CVP had 43% higher probability of requiring salvage therapy versus those receiving R-CHOP, however R-CVP remains a good option in patients for whom the goal of therapy is treatment tolerability.r
Efficacy
Time to Progressionr

Fig 3.Time to treatment progression in patients assigned to chemotherapy with cyclophosphamide, vincristine, and prednisone (CVP) or with CVP plus rituximab (R-CVP), according to baseline Follicular Lymphoma International Prognostic Index (FLIPI) score. (A) FLIPI 0 to 1, good prognosis; (B) FLIPI 2, intermediate prognosis; (C) FLIPI 3 to 5, poor prognosis.
© Journal of Clinical Oncology 2008
Duration of responser

© Journal of Clinical Oncology 2008
Toxicity
95% of patients receiving CVP reported at least one adverse event which was similar to the R-CVP group (97%). These were predominantly associated with the gastrointestinal and nervous systems.
The most common severe adverse events were neutropenia, fatigue and back pain. These occurred at a slightly higher frequency in patients receiving R-CVP than CVP alone.
The incidence of grade 3 or 4 neutropenia was higher during treatment with R-CVP (24%) compared to CVP (14%). There was no difference between groups in the overall infection rate or incidence of neutropenic sepsis.
Following CVP-R, 5 patients experienced a total of 6 life-threatening events. There were, however, no treatment-related deaths.
71% of patients who received CVP-R experienced an adverse event within 24 hours of treatment, compared to 51% in the CVP arm. These adverse events were mostly rituximab-associated reaction.