Figure 14-76.

Meningioma, Brain, Cat.

A, On the surface of the right parietal cortex is a mass (arrows) that has compressed and distorted the adjacent parenchyma. It is a space-occupying lesion that has displaced the midline (cerebral longitudinal fissure) to the left. B, Transverse section at the level of the hippocampus of the brain depicted in A. The tumor has compressed the right cerebral hemisphere, and this has resulted in the midline being displaced to the left with compression of the left cerebral hemisphere. The meningioma does not invade the brain and can be “shelled” out at necropsy or surgery.

(Courtesy College of Veterinary Medicine, University of Illinois.)