Multimodal brain MRI and clinical data in olfactory groove meningioma: a prospective data report

Olfactory groove meningiomas are uncommon skull base tumors that often present at advanced stages and may cause persistent cognitive and behavioral disturbances despite successful surgical treatment. Neuroimaging studies of this tumor entity have been limited, and publicly available multimodal MRI datasets remain scarce. Here, we present a prospective, single-center dataset comprising multimodal magnetic resonance imaging and longitudinal clinical data from patients with olfactory groove meningiomas acquired before and after surgical intervention. The dataset includes high-resolution structural MRI, diffusion MRI with tensor-derived metrics, resting-state functional MRI, tumor and peritumoral edema segmentation masks, and detailed clinical and neuropsychological assessments. Imaging data were acquired using a standardized protocol and processed with reproducible pipelines, including quality control and de-identification procedures, and organized in a BIDS format. This dataset is intended to support reproducible research and secondary analyses focused on tumor-related brain alterations, imaging biomarker development, and postoperative recovery in neuro-oncology.