A prognostic cytogenetic scoring system to guide the adjuvant management of patients with atypical meningioma

Neuro-oncology
Ayal A AizerBrian M Alexander

Abstract

The appropriate use of adjuvant therapy in patients with gross totally resected atypical meningioma requires an accurate assessment of recurrence risk. We sought to determine whether cytogenetic/genetic characterization may facilitate better estimation of the probability of recurrence. We first analyzed our clinical database, including high-resolution DNA copy number data, to identify 11 common copy number aberrations in a pilot cohort of meningiomas of all grades. We summed these aberrations to devise a cytogenetic abnormality score (CAS) and determined the CAS from archived tissue of a separate cohort of 32 patients with gross totally resected atypical meningioma managed with surgery alone. Propensity score adjusted Cox regression was used to determine whether the CAS was predictive of recurrence. An association between higher CAS and higher grade was noted in our pilot cohort with heterogeneity among atypical tumors. Among the 32 patients who underwent gross total resection of an atypical meningioma, the CAS was not significantly associated with age, gender, performance status, or tumor size/location but was associated with the risk of recurrence on univariable analysis (hazard ratio per aberration = 1.52; 95% CI = 1.08-2.14...Continue Reading

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