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Abstract
High dose chemotherapy with autologous stem cell transplant (HD-ASCT) is a recommended procedure for patients with transformed indolent B-cell lymphoma from the pre-rituximab era. In this retrospective single-center study, we present our experience with HD-ASCT in patients with histologically verified transformed indolent B-cell lymphoma in the rituximab era. Forty-two patients were included, of whom 28 with chemosensitive disease proceeded to HD-ASCT. Twenty patients (71%) achieved a complete response (CR) and five (18%) a partial response (PR) after HD-ASCT. With a median observation time of 49 months for the survivors, the median progression-free survival (PFS) and overall survival (OS) for patients with HD-ASCT were 39 months and 57 months, respectively. Patients who were rituximab-naive at transformation had a significantly better OS compared to patients previously treated with rituximab, both in the whole patient cohort and among the HD-ASCT-treated patients (p = 0.036 and p = 0.039, respectively). Furthermore, male sex influenced survival negatively, whereas time from diagnosis to transformation was positively associated with survival, both with borderline significance, in HD-ASCT-treated patients. In conclusion, HD-ASCT remains an effective treatment for transformed indolent lymphomas in the rituximab era.
Acknowledgements
Y.N.B. receives financial support as a PhD student from the Southern and Eastern Norway Regional Health Authority. H.H. and E.B.S. receive financial support from the Norwegian Cancer Society.
Potential conflict of interest
Disclosure forms provided by the authors are available with the full text of this article at www.informahealthcare.com/lal.