Neuroendocrine late effects after tailored photon radiotherapy for children with low grade gliomas: Long term correlation with tumour and treatment parameters

Deborah Aloi, Liliana Belgioia, Salvina Barra, Flavio Giannelli, Francesca Cavagnetto, Fabio Gallo, Claudia Milanaccio, MariaLuisa Garrè, Sonia Di Profio, Natascia Di Iorgi, Renzo Corvò

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PURPOSE: To evaluate neuroendocrine late effects in paediatric patients with low grade glioma (LGG) who underwent radiotherapy.

METHODS AND MATERIAL: We performed a retrospective evaluation of 40 children with LGG treated from July 2002 to January 2015 with external radiotherapy. Tumour locations were cerebral hemisphere (n=2); posterior fossa (n=15); hypothalamic-pituitary axis (HPA, n=15); spine (n=5). Three patients presented a diffuse disease. We looked for a correlation between endocrine toxicity and tumour and treatment parameters. The impact of some clinical and demographic factors on endocrinal and neuro toxicity was evaluated using the log-rank test.

RESULTS: The median follow-up was 52months (range: 2-151). Median age at irradiation was 6. The dose to the HPA was significantly associated with endocrine toxicity (P value=0.0190). Patients who received chemotherapy before radiotherapy and younger patients, showed worse performance status and lower IQ. The 5-year overall survival (OS) and progression free survival (PFS) rates were 94% and 73.7%, respectively.

CONCLUSION: Radiotherapy showed excellent OS and PFS rates and acceptable late neuroendocrine toxicity profile in this population of LGG patients treated over a period of 13years. In our experience, the dose to the HPA was predictive of the risk of late endocrine toxicity.

Original languageEnglish
Pages (from-to)241-247
Number of pages7
JournalRadiotherapy and Oncology
Issue number2
Publication statusPublished - Nov 2017



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