RESUMEN
PURPOSE: We evaluated 8-year survival and late neuropsychologic toxicity in children with acute lymphoblastic leukemia treated in a randomized clinical trial to test whether hyperfractionated (twice daily) cranial radiation therapy (CRT) can reduce incidence and severity of late toxicities associated with 18 Gy of CRT. PATIENTS AND METHODS: Between 1987 and 1995, 369 children treated on two consecutive Dana-Farber Cancer Institute Consortium protocols for high-risk acute lymphoblastic leukemia were randomly assigned to conventionally fractionated CRT (CFX) or hyperfractionated CRT (HFX) to a total dose of 18 Gy. Neuropsychologic testing was completed for 125 of 287 children in continuous complete remission. Event-free and overall survival, as well as neuropsychologic function, were compared for the two arms of the protocol. RESULTS: Eight-year event-free survival (+/- SE) was 80% +/- 3% for children randomly assigned to CFX and 72% +/- 3% for HFX (P =.06). Overall survival was 85% +/- 3% for CFX and 78% +/- 3% for HFX (P =.06). CNS relapses occurred in 2.8% of patients receiving CFX and 2.7% receiving HFX (P =.99). Cognitive function for both groups was solidly in the average range, with no group differences in intelligence, academic achievement, visuospatial reasoning, or verbal learning. Children on the HFX arm exhibited a modest advantage for visual memory (P <.05). CONCLUSION: HFX provides no benefit in terms of cognitive late effects and may compromise antileukemic efficacy. HFX should not be substituted for conventionally dosed CRT in children who require radiation therapy for treatment of acute lymphoblastic leukemia.
Asunto(s)
Trastornos del Conocimiento/etiología , Irradiación Craneana/efectos adversos , Irradiación Craneana/métodos , Trastornos de la Memoria/etiología , Leucemia-Linfoma Linfoblástico de Células Precursoras/radioterapia , Traumatismos por Radiación/prevención & control , Adolescente , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Niño , Preescolar , Trastornos del Conocimiento/prevención & control , Supervivencia sin Enfermedad , Fraccionamiento de la Dosis de Radiación , Femenino , Humanos , Lactante , Masculino , Trastornos de la Memoria/prevención & control , Leucemia-Linfoma Linfoblástico de Células Precursoras/tratamiento farmacológico , Factores de Riesgo , Análisis de SupervivenciaRESUMEN
The purpose of this project was to obtain input from the families of survivors of childhood cancer regarding their needs surrounding the "coming off treatment" (COT) period. A questionnaire was developed to record their needs, their wishes, and their satisfaction surrounding this period of time. Closer examination of the time surrounding COT was undertaken in an attempt to enhance this area of service for patients and families in our clinic setting. Establishing a structured protocol is likely to alleviate some of the anxiety that surrounds this time for families and help us to provide better continuity of care. After identifying a cohort of patients and families, the reason for the survey was explained and they were asked to complete the questionnaire before they left the clinic setting. At the completion of the study, 82% of the cohort had been approached, and 100% of this group had completed the survey (n = 41). Less than 50% of participants felt they had had a formal "coming off treatment" review but, of that same group, 89% were satisfied with the process. Participants identified areas of importance and health care professionals who they would like involved in the COT process. After reviewing the responses to the questionnaires, the decision was made to proceed in preparing a COT protocol.