CD34+ dose-driven administration of granulocyte colony-stimulating factor after high-dose chemotherapy in lymphoma patients.

Our goal was to optimize use of granulocyte colony-stimulating factor (G-CSF) after high-dose chemotherapy and autologous peripheral blood stem-cell transplantation in lymphoma patients, limiting G-CSF administration to patients infusing a suboptimal CD34(+) cell number. Of 124 consecutive patients with histologically proven Hodgkin's and non-Hodgkin's lymphoma from January 2001 to June 2004, 60 patients (group 1) given > or = 5 x 10(6)/kg CD34(+) cells received no G-CSF; 64 patients (group 2) given < or = 5 x 10(6)/kg CD34(+) cells received G-CSF from day +5 after stem-cell reinfusion. The median times to reach 0.5 x 10(9)/L and 1.0 x 10(9)/L neutrophils were, respectively, 3 and 4 d shorter in G-CSF group and this difference was statistically significant (P = 0.0014; P = 0.0001). In terms of antibiotic and antimycotic requirements, gastrointestinal toxicity, days of hospitalization, and transfusion requirements, no differences were demonstrated between the two groups. No statistically significant difference was demonstrated for the total number of febrile episodes (52 for group 1; 53 for group 2; P = 0.623) and the median number of febrile days (2 d for both groups). Myeloid reconstitution values for both groups agree with published results for autotransplanted patients treated with G-CSF from 7 to 14 d. Also, major clinical events, antibiotic, antimycotic, and transfusion requirements, and hospital stay were similar to published findings. Our data suggest that G-CSF administration can be safely optimized, used only for patients infused with a suboptimal CD34(+) cell dose.

What is the best option to cure patients with resistant/relapsing Hodgkin's disease?

Nearly 80% of patients with Hodgkin's disease (HD) are cured with chemotherapy with or without radiotherapy. However, in patients with primary refractory or relapsed disease, high-dose therapy (HDT) and autologous or peripheral-blood stem-cell transplantation (ASCT or PBSCT) represents the best curative option. Several prognostic factors to identify patients at high risk for relapse or progression have been analyzed. However, in almost all analyzed series, disease status before high-dose chemotherapy with PBSC support remains the most important factor predicting the outcome of these patients. Nonetheless, the benefit of cytoreduction before HDT has yet to be fully determined and efforts to identify the best active regimen, combining therapeutic activity and CD34+ stem-cell mobilizing potential, represent a challenging issue for these patients. Furthermore new approaches like myeloablative and non-myeloablative allogeneic transplants have been assessed to improve long-term in such patients. In this review we analyzed the results of the most important salvage chemotherapy combinations as well as allogeneic transplantations to clarify the optimal treatment options for patients with resistant/relapsing HD.