A benign tumor formed of bundles of proliferating fibroblastic meningothelial cells with focal whorling. Cytoplasm is scanty and cell borders are ill-defined. In other areas, tumor cells have eosinophilic and abundant cytoplasm and cell borders are ill-defined. Scattered psammoma bodies are evident. No evidence of atypia or malignancy. This is a WHO grade I meningioma.
Foramen magnum mass attached to an artery and lower cranial structures.
Soft tissue fragments collectively measured 3.5x2.8x0.8 cm, totally embedded.
Foramen magnum mass, excision: