Elena V Daoud, Kelsey Zhu, Bruce Mickey, Hussein Mohamed, Mandisa Wen, Michael Delorenzo, Ivy Tran, Jonathan Serrano, Kimmo J Hatanpaa, Jack M Raisanen, Matija Snuderl, Chunyu Cai
Chordoid meningioma is a morphological variant of meningioma designated as WHO grade 2. However, the recurrence rates varied widely in different case series, and to date, a unifying molecular genetic signature has not been identified. Among 1897 meningiomas resected at our institution, we identified 12 primary chordoid meningiomas from 12 patients. Histologically, all 12 cases had predominant (> 50%) chordoid morphology. Ten were otherwise grade 1, and two were also atypical. We performed DNA global methylation profile, copy number variation analysis, and targeted next-generation sequencing on 11 chordoid meningiomas, and compared to those of 51 non-chordoid, mostly high grade meningiomas...
April 19, 2022: Acta Neuropathologica Communications