Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-53278
Martinelli, G; Schmitz, S F H; Utiger, U; Cerny, T; Hess, U; Bassi, S; Okkinga, E; Stupp, R; Stahel, R; Heizmann, M; Vorobiof, D; Lohri, A; Dietrich, P Y; Zucca, E; Ghielmini, M (2010). Long-term follow-up of patients with follicular lymphoma receiving single-agent rituximab at two different schedules in trial SAKK 35/98. Journal of Clinical Oncology, 28(29):4480-4484.
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We report the long-term results of a randomized clinical trial comparing induction therapy with once per week for 4 weeks single-agent rituximab alone versus induction followed by 4 cycles of maintenance therapy every 2 months in patients with follicular lymphoma.
PATIENTS AND METHODS:
Patients (prior chemotherapy 138; chemotherapy-naive 64) received single-agent rituximab and if nonprogressive, were randomly assigned to no further treatment (observation) or four additional doses of rituximab given at 2-month intervals (prolonged exposure).
At a median follow-up of 9.5 years and with all living patients having been observed for at least 5 years, the median event-free survival (EFS) was 13 months for the observation and 24 months for the prolonged exposure arm (P < .001). In the observation arm, patients without events at 8 years were 5%, while in the prolonged exposure arm they were 27%. Of previously untreated patients receiving prolonged treatment after responding to rituximab induction, at 8 years 45% were still without event. The only favorable prognostic factor for EFS in a multivariate Cox regression was the prolonged rituximab schedule (hazard ratio, 0.59; 95% CI, 0.39 to 0.88; P = .009), whereas being chemotherapy naive, presenting with stage lower than IV, and showing a VV phenotype at position 158 of the Fc-gamma RIIIA receptor were not of independent prognostic value. No long-term toxicity potentially due to rituximab was observed.
An important proportion of patients experienced long-term remission after prolonged exposure to rituximab, particularly if they had no prior treatment and responded to rituximab induction.
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|Item Type:||Journal Article, refereed, original work|
|Communities & Collections:||04 Faculty of Medicine > University Hospital Zurich > Clinic for Oncology|
|Dewey Decimal Classification:||610 Medicine & health|
|Deposited On:||12 Jan 2012 22:02|
|Last Modified:||02 Dec 2013 03:36|
|Publisher:||American Society of Clinical Oncology|
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