Does anyone know about pericolsall aneurysms

A little, but not a lot.

A Pericallosal aneurysm are an aneurysm on the pericallosal artery and are considered rare. The pericallosal artery branches off of the anterior cerebral arteries (ACA) in the brain, it has many small branches feeding blood to the corpus callosum or the ‘bridge’ between the left and right hemispheres of the brain.
Such aneurysms are more common in children than in adults, especially as a result of trauma in children. But are still considered rare.
Hope it helps.

Merl from the Moderator Support Team

i heard they can be trauma based. I had 3 concussions

3 concussions? depending on the location of the concussion that can be the cause.