P-CHOP: cisplatin (P) added to the standard CHOP regimen as first-line treatment for aggressive non-Hodgkin lymphoma: a single-institution phase II study.

We designed the P-CHOP regimen, which involves the addition of cisplatin (P) to the standard CHOP (cyclophosphamide, doxorubicin, vincristine, prednisone) regimen, and investigated its activity and its toxicities in a single institution phase II study. Twenty-two consecutive patients with untreated, aggressive, stage I-IV non-Hodgkin lymphoma were enrolled in the study. Cisplatin was administered at a dose of 40 mg/m2 on days 1 and 2, every 3 weeks; the dose and schedule of the other agents were identical to those used in the standard CHOP regimen. The complete remission (CR) rate was 86\% in eligible and 80\% in all the treated patients, which compares favorably with the CR rates of two recent randomized studies of CHOP versus other regimens. P-CHOP is an innovative regimen for the front-line treatment of aggressive non-Hodgkin lymphoma. It is feasible and warrants further research, which would ideally take the form of a randomized comparison of P-CHOP and CHOP, possibly with the addition of rituximab in both arms.