Single - center study of chemoradiotherapy and targeted therapy for diffuse intrinsic pontine glioma

Objective To explore effective treatments and prognostic factors for diffuse intrinsic pontine glioma (DIPG). Methods Clinical and imaging information and survival data of 14 DIPG patients, treated with radiotherapy combined with temozolomide and nitolizumab or radiotherapy combined with ACT001, were retrospectively analysed at Beijing Tiantan Hospital, Capital Medical University from April 2021 to January 2024. The median progression free survival (PFS) and overall survival (OS) were calculated using Kaplan - Meier survival curves, and multifactorial Cox regression analysis was used to investigate the effects of different factors on PFS and OS. Results The objective response rate (ORR) was 10/14, and the median PFS and OS were 7.83 and 8.30 months, respectively. Multfactorial Cox regression analysis identified the absence of enhancement on baseline imaging as a good prognostic variable for both PFS (RR = 0.052, 95%CI: 0.006-0.416; P = 0.005) and OS (RR = 0.046, 95%CI: 0.005-0.413; P = 0.006), while male (RR = 0.085, 95%CI: 0.009-0.764; P = 0.028), older age (RR = 0.631, 95%CI: 0.423-0.942; P = 0.024), and the absence of symptoms of cranial nerve involvement at the onset (RR = 0.116, 95%CI: 0.017- 0.781; P = 0.027) were also good prognostic variables for OS. Conclusions Female, younger age at diagnosis, cranial nerve involvement at the onset, and enhancement on baseline imaging are risk factors for the survival of children with DIPG.