PMID- 34385566 OWN - NLM STAT- MEDLINE DCOM- 20211112 LR - 20211112 IS - 2045-2322 (Electronic) IS - 2045-2322 (Linking) VI - 11 IP - 1 DP - 2021 Aug 12 TI - WHO grade I meningiomas that show regrowth after gamma knife radiosurgery often show 1p36 loss. PG - 16432 LID - 10.1038/s41598-021-95956-x [doi] LID - 16432 AB - WHO grade I meningiomas occasionally show regrowth after radiosurgical treatment, which cannot be predicted by clinical features. There is increasing evidence that certain biomarkers are associated with regrowth of meningiomas. The aim of this retrospective study was to asses if these biomarkers could be of value to predict regrowth of WHO grade I meningiomas after additive radiosurgery. Forty-four patients with WHO grade I meningiomas who underwent additive radiosurgical treatment between 2002 and 2015 after Simpson IV resection were included in this study, of which 8 showed regrowth. Median follow-up time was 64 months (range 24-137 months). Tumors were analyzed for the proliferation marker Ki-67 by immunohistochemistry and for deletion of 1p36 by fluorescence in situ hybridization (FISH). Furthermore, genomic DNA was analyzed for promoter hypermethylation of the genes NDRG1-4, SFRP1, HOXA9 and MGMT. Comparison of meningiomas with and without regrowth after radiosurgery revealed that loss of 1p36 (p = 0.001) and hypermethylation of NDRG1 (p = 0.046) were correlated with regrowth free survival. Loss of 1p36 was the only parameter that was significantly associated with meningioma regrowth after multivariate analysis (p = 0.01). Assessment of 1p36 loss in tumor tissue prior to radiosurgery might be considered an indicator of prognosis/regrowth. However, this finding has to be validated in an independent larger set of tumors. CI - (c) 2021. The Author(s). FAU - Damen, Pim J J AU - Damen PJJ AD - Department of Pathology, GROW School for Oncology and Developmental Biology, Maastricht University Medical Centre, P. Debyelaan 25, Postbox 5800, 6202 AZ, Maastricht, The Netherlands. FAU - Bulthuis, Vincent J AU - Bulthuis VJ AD - Department of Neurosurgery, Maastricht University Medical Center, Maastricht, The Netherlands. FAU - Hanssens, Patrick E J AU - Hanssens PEJ AD - Gamma Knife Center Tilburg, ETZ-Elisabeth Hospital, Tilburg, The Netherlands. FAU - Lie, Suan Te AU - Lie ST AD - Gamma Knife Center Tilburg, ETZ-Elisabeth Hospital, Tilburg, The Netherlands. FAU - Fleischeuer, Ruth AU - Fleischeuer R AD - Department of Pathology, ETZ-Elisabeth Hospital, Tilburg, The Netherlands. FAU - Melotte, Veerle AU - Melotte V AD - Department of Pathology, GROW School for Oncology and Developmental Biology, Maastricht University Medical Centre, P. Debyelaan 25, Postbox 5800, 6202 AZ, Maastricht, The Netherlands. FAU - Wouters, Kim A AU - Wouters KA AD - Department of Pathology, GROW School for Oncology and Developmental Biology, Maastricht University Medical Centre, P. Debyelaan 25, Postbox 5800, 6202 AZ, Maastricht, The Netherlands. FAU - Ruland, Andrea AU - Ruland A AD - Department of Pathology, GROW School for Oncology and Developmental Biology, Maastricht University Medical Centre, P. Debyelaan 25, Postbox 5800, 6202 AZ, Maastricht, The Netherlands. FAU - Beckervordersandforth, Jan AU - Beckervordersandforth J AD - Department of Pathology, GROW School for Oncology and Developmental Biology, Maastricht University Medical Centre, P. Debyelaan 25, Postbox 5800, 6202 AZ, Maastricht, The Netherlands. FAU - Speel, Ernst Jan M AU - Speel EJM AD - Department of Pathology, GROW School for Oncology and Developmental Biology, Maastricht University Medical Centre, P. Debyelaan 25, Postbox 5800, 6202 AZ, Maastricht, The Netherlands. ernstjan.speel@mumc.nl. LA - eng PT - Journal Article DEP - 20210812 PL - England TA - Sci Rep JT - Scientific reports JID - 101563288 SB - IM MH - *Chromosome Deletion MH - *Chromosomes, Human, Pair 1 MH - Female MH - Humans MH - Male MH - Meningeal Neoplasms/*pathology/*radiotherapy MH - Meningioma/*pathology/*radiotherapy MH - Middle Aged MH - Neoplasm Recurrence, Local/*pathology MH - Radiosurgery/*methods MH - Retrospective Studies MH - Survival Rate MH - Treatment Outcome MH - World Health Organization PMC - PMC8361078 COIS- The authors declare no competing interests. EDAT- 2021/08/14 06:00 MHDA- 2021/11/16 06:00 PMCR- 2021/08/12 CRDT- 2021/08/13 06:53 PHST- 2021/01/07 00:00 [received] PHST- 2021/07/21 00:00 [accepted] PHST- 2021/08/13 06:53 [entrez] PHST- 2021/08/14 06:00 [pubmed] PHST- 2021/11/16 06:00 [medline] PHST- 2021/08/12 00:00 [pmc-release] AID - 10.1038/s41598-021-95956-x [pii] AID - 95956 [pii] AID - 10.1038/s41598-021-95956-x [doi] PST - epublish SO - Sci Rep. 2021 Aug 12;11(1):16432. doi: 10.1038/s41598-021-95956-x.