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

• 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. Hyperostosis and dural tails present.