Among all the childhood central nervous system tumours, medulloblastoma and other neuroectodermal tumours account for 16-25% of cases. The causative factors of medulloblastoma/PNET have not been well established. It is more frequent in boys than in girl and in children than in adults. There was a significant improvement of survival for children diagnosed in 2000-2002 compared to those diagnosed in 1995-1999. The risk of dying was reduced by 30%. Patients are generally divided into risk-stratified schemes on the basis of age, the extent of residual disease, and dissemination. Sixty to 70% of patients older than 3 years are assigned to the average-risk group. High-risk patients include those in the disseminated category, and in North American trials those that have less than a gross or near-total resection, which is arbitrarily defined as 1.5 cm(2) of post-operative residual disease. Current and currently planned clinical trials will: (1) evaluate the feasibility of reducing both the dose of craniospinal irradiation and the volume of the posterior fossa radiotherapy boost by the modest intensification of chemotherapy in standard-risk patients; (2) determine whether intensification of chemotherapy or irradiation can improve outcome in patients with high-risk disease; define molecular and biological markers that improve outcome prediction in patients with medulloblastoma and which can be incorporated for front-line stratification of newly defined risk subgroups. (C) 2010 Elsevier Ireland Ltd. All rights reserved.
Childhood medulloblastoma / Maura, Massimino; Giangaspero, Felice; Maria Luisa, Garre; Lorenza, Gandola; Geraldina, Poggi; Veronica, Biassoni; Gemma, Gatta; Stefan, Rutkowski. - In: CRITICAL REVIEWS IN ONCOLOGY HEMATOLOGY. - ISSN 1040-8428. - STAMPA. - 79:1(2011), pp. 65-83. [10.1016/j.critrevonc.2010.07.010]
Childhood medulloblastoma
GIANGASPERO, FELICE;
2011
Abstract
Among all the childhood central nervous system tumours, medulloblastoma and other neuroectodermal tumours account for 16-25% of cases. The causative factors of medulloblastoma/PNET have not been well established. It is more frequent in boys than in girl and in children than in adults. There was a significant improvement of survival for children diagnosed in 2000-2002 compared to those diagnosed in 1995-1999. The risk of dying was reduced by 30%. Patients are generally divided into risk-stratified schemes on the basis of age, the extent of residual disease, and dissemination. Sixty to 70% of patients older than 3 years are assigned to the average-risk group. High-risk patients include those in the disseminated category, and in North American trials those that have less than a gross or near-total resection, which is arbitrarily defined as 1.5 cm(2) of post-operative residual disease. Current and currently planned clinical trials will: (1) evaluate the feasibility of reducing both the dose of craniospinal irradiation and the volume of the posterior fossa radiotherapy boost by the modest intensification of chemotherapy in standard-risk patients; (2) determine whether intensification of chemotherapy or irradiation can improve outcome in patients with high-risk disease; define molecular and biological markers that improve outcome prediction in patients with medulloblastoma and which can be incorporated for front-line stratification of newly defined risk subgroups. (C) 2010 Elsevier Ireland Ltd. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.