AUTHOR=Jiang Tao , Zhang Yuqi , Wang Junmei , Du Jiang , Raynald  , Qiu Xiaoguang , Wang Ying , Li Chunde 

TITLE=A Retrospective Study of Progression-Free and Overall Survival in Pediatric Medulloblastoma Based on Molecular Subgroup Classification: A Single-Institution Experience

JOURNAL=Frontiers in Neurology

VOLUME=8

YEAR=2017

URL=https://www.frontiersin.org/journals/neurology/articles/10.3389/fneur.2017.00198

DOI=10.3389/fneur.2017.00198

ISSN=1664-2295

ABSTRACT=<sec id="ST1"><title>Background</title><p>Medulloblastoma (MB) has been classified into four core subgroups according to the transcriptional profile in recent years. However, some disagreement among researchers remains regarding the prognoses and most effective treatments of the different subgroups with different age distributions.</p></sec><sec id="ST2"><title>Objective</title><p>The objective of this study was to analyze MB prognosis in children population based on the classification of four molecular subgroups.</p></sec><sec id="ST3"><title>Methods</title><p>From January 2011 to January 2013, 84 consecutive MB patients aged underwent tumor removal at Beijing Tiantan Hospital. A total of 55 patients who ranged in age from 4 to 18 years underwent detailed follow-up. Molecular subgrouping was performed using RT-PCR.</p></sec><sec id="ST4"><title>Results</title><p>The 2-year progression-free survival (PFS) and overall survival (OS) rates for the entire cohort were 76.2 ± 5.8 and 81.8 ± 5.2%, respectively. Univariate analysis revealed that the Group 4 patients had a better survival (2-year OS, 90.6 ± 5.2%) than the SHH subgroup (<italic>P</italic> = 0.002) and Group 3 patients (<italic>P</italic> = 0.008). Only two of the 23 non-metastasized Group 4 patients relapsed, and chemotherapy did significantly affect these patients (PFS, <italic>P</italic> = 0.685). One out of five WNT patients had tumor relapse and died at last. Large cell/anaplastic (LC/A) histology and chemotherapy were independent risk factors in multivariate analysis.</p></sec><sec id="ST5"><title>Conclusion</title><p>In our study, the non-metastasized Group 4 patients had an excellent prognosis. The SHH subgroup and Group 3 patients had worst prognoses. LC/A histology had a dismal prognosis in our cohorts, which warrants intensive treatment.</p></sec>