=====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

{{::mening_labeled.png?600|}}

{{::plaque_mening.png?600|}}{{::plaquemening2.png?600|}}


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

{{::ax_t1_c_meningioma.gif?}}


Below: Note the unfortunate presence of TWO meningiomas. Hyperostosis and dural tails present.

{{::copy_of_double_meningioma.gif?}}