Meningioma

Meningioma

Meningiomas are typically benign and slow growing tumors arising from the meninges. They are commonly well encapsulated, focal, round, and solid. Less commonly, meningiomas can be invasive, have plaque-like shapes, or varied internal composition. They can occur anywhere along the CNS, but are most common around the brain. Meningiomas have a few key identifying characteristics; some or all may be present:

Vivid contrast enhancement

'Dural Tail' sign

Compression or herniation of other brain structures

Hyperostosis (bony overgrowth) of the cranium by the tumor

Hemorrhagic or cystic components

Important Sequences for Identifying Meningioma

T1 weighted Post Contrast ; with or without Fat Saturation

Below: Large meningioma in a cat; note the strong and homogenous enhancement, dural tail, and hyperostosis present

Below: Note the unfortunate presence of TWO meningiomas