RT Journal Article T1 Central nervous system involvement at first relapse in patients with acute promyelocytic leukemia treated with all-trans retinoic acid and anthracycline monochemotherapy without intrathecal prophylaxis. A1 Montesinos, Pau A1 Díaz-Mediavilla, Joaquín A1 Debén, Guillermo A1 Prates, Virginia A1 Tormo, Mar A1 Rubio, Vicente A1 Pérez, Inmaculada A1 Fernández, Isolda A1 Viguria, Maricruz A1 Rayón, Chelo A1 González, José A1 Serna, Javier de la A1 Esteve, Jordi A1 Bergua, Juan M A1 Rivas, Concha A1 González, Marcos A1 González, Jose D A1 Negri, Silvia A1 Brunet, Salut A1 Lowenberg, Bob A1 Sanz, Miguel A K1 Acute promyelocytic leukemia K1 Central nervous system relapse K1 All-trans retinoic acid K1 Idarubicin K1 Prognostic factors K1 Neoplasias del sistema nervioso central K1 Antibióticos antineoplásicos K1 Leucemia promielocítica aguda AB BACKGROUNDThe prevalence of and risk factors for central nervous system recurrence in patients with acute promyelocytic leukemia are not well established and remain a controversial matter.DESIGN AND METHODSBetween 1996 and 2005, 739 patients with newly diagnosed acute promyelocytic leukemia enrolled in two consecutive trials (PETHEMA LPA96 and LPA99) received induction therapy with all-trans retinoic acid and idarubicin. Consolidation therapy comprised three courses of anthracycline monochemotherapy (LPA96), with all-trans retinoic acid and reinforced doses of idarubicin in patients with an intermediate or high risk of relapse (LPA99). Central nervous system prophylaxis was not given.RESULTSCentral nervous system relapse was documented in 11 patients. The 5-year cumulative incidence of central nervous system relapse was 1.7% (LPA96 3.2% and LPA99 1.2%; p=0.09). The cumulative incidence was 0%, 0.8%, and 5.5% in low-, intermediate-, and high-risk patients, respectively. Relapse risk score (p=0.0001) and the occurrence of central nervous system hemorrhage during induction (5-year cumulative incidence 18.7%, p=0.006) were independent risk factors for central nervous system relapse.CONCLUSIONSThis study shows a low incidence of central nervous system relapse in patients with acute promyelocytic leukemia following therapy with all-trans retinoic acid and anthracycline without specific central nervous system prophylaxis. Central nervous system relapse was significantly associated with high white blood cell counts and prior central nervous system hemorrhage, which emerged as independent prognostic factors. PB Ferrata Storti Foundation SN 0390-6078 YR 2009 FD 2009-09 LK http://hdl.handle.net/10668/1276 UL http://hdl.handle.net/10668/1276 LA en NO Montesinos P, Díaz-Mediavilla J, Debén G, Prates V, Tormo M, Rubio V, et al. Central nervous system involvement at first relapse in patients with acute promyelocytic leukemia treated with all-trans retinoic acid and anthracycline monochemotherapy without intrathecal prophylaxis. Haematologica. 2009; 94(9):1242-9 NO Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't; DS RISalud RD Apr 8, 2025