A multi-centre Canadian pilot study of metronomic temozolomide combined with radiotherapy for newly diagnosed paediatric brainstem glioma

European Journal of Cancer : Official Journal for European Organization for Research and Treatment of Cancer (EORTC) [and] European Association for Cancer Research (EACR)
Julia R SharpS Baruchel

Abstract

Survival rates for paediatric diffuse intrinsic brainstem glioma (DIBSG) are dismal. Metronomic dosing of temozolomide (TMZ) combined with standard radiotherapy may improve survival by increasing the therapeutic index and anti-angiogenic effect of TMZ. This study aimed to evaluate the safety and efficacy of this regimen in paediatric DIBSG patients. Children aged 18 years or younger with newly diagnosed DIBSG were treated with standard radiotherapy and concomitant metronomic TMZ at 85 mg/m(2)/day for 6 weeks, followed by metronomic TMZ monotherapy at the same dose. Treatment was continued until tumour progression or unacceptable toxicity occurred. Primary endpoints included overall survival and toxicities. For patients who consented, plasma and urine samples were collected at diagnosis, post-induction and prior to each course of maintenance therapy for the quantification of angiogenesis markers. Fifteen eligible patients were enrolled, with a median age of 6.4 years. The most common toxicities were myelosuppression, most notably prolonged lymphopaenia and thrombocytopaenia. The only dose-limiting toxicity was thrombocytopaenia. Intratumoural haemorrhage was confirmed in one patient. Median time to progression was 5.13 months (9...Continue Reading

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