ISHL10 Abstract P055

Multicentric Italian Experience in Treatment of Nodular Lymphocyte Predominant Hodgkin lymphoma (NLPHL) in the Rituximab Era

Nodular lymphocyte predominant Hodgkin lymphoma (NLPHL) is characterized by the expression of B-cell associated antigen CD20. Due to this characteristic it has been proposed the use of the anti-CD20 antibody but at now, there is no consensus on which chemotherapy regimen should be used. In patients with stage IA two prospective studies evaluated the role of the anti-CD20 antibody in monotherapy (GHSG and Stanford); both of them concluded that rituximab cannot be recommended as a first-line therapy and ESMO guidelines recommend radiotherapy for this subset of patients. In other stages chemotherapy is generally recommended, but there is no consensus on whether classical HL-directed regimens, such as ABVD (doxorubicin, bleomycin, vinblastine, dacarbazine), or B-cell lymphoma-directed regimens, such as R-CHOP (rituximab, cychlophosphamide, doxorubicin, vincristine, prednisone) should be used. In order to plan clinical trials and to test our potential accrual we performed a retrospective analysis of patients treated between 2000 and 2016 in 8 Italian hematologic centers. We identified 113 pts affected by NLPHL (41 stage I without symptoms, 40 stage II, 21 stage III, 11 stage IV). 11 patients had extranodal disease (pancreas, intestine, skin, lung, liver, bone marrow, muscle), 14 had spleen involvement and 9 had B symptoms. Median age at diagnosis was 43, male:female ratio was 2.9. Median follow-up is 62 months (range 1-199 months). 5yr-OS and 3yr-EFS were respectively 95.5% and 85.9%.13 patients had relapse of NLPHL, 5 patients had transformation to DLBCL at a median of 14 months, 4 patients died (1 from acute myelogenous leukemia, 1 from progression of disease, 1 from stomach cancer and 1 for interstitial pneumonia during ABVD). Treatments for non-stage I pts were as follows: 29 ABVD ± IFRT (II 19, III 6, IV 4), 13 R-ABVD (II 5, III 5, IV 3), 24 R-CHOP ± IFRT (II 10, III 10, IV 4) and 6 other (2 observation, 2 IFRT, 1 Rituximab, 1 CHOP like).3-years event-free survival are as follows: 78.5% (58-90) for ABVD±RT, 100% for R-ABVD and 74% for R-CHOP (48-88). No statistically significant difference was observed in terms of EFS neither for therapy regimen (p 0.512) , nor for stage and spleen involvement (p 0.33). Our data do not show any difference among classical HL-directed regimens, B-cell lymphoma-directed regimens or composite approach. A prospective randomized large cohort evaluation should be taken into account

Authors

  • M. Gotti
  • F. Merli
  • A. Re
  • C. Rusconi
  • A. Pulsoni
  • L. Rigacci
  • M. Merli
  • M. Liberati
  • V. Ferretti
  • V. Zoboli
  • A. Fama
  • D. Dalceggio
  • E. Meli
  • G. Annechini
  • B. Puccini
  • A. Ferrario
  • V. Appolloni
  • R. Sciarra
  • M. Frigeni
  • L. Arcaini
  • M. Bonfichi