Arachnoid cyst found at age 9, and today I saw a block protruding from under the right side of my brain

Aug 30 20213 people replied
Description Of Condition:

At the age of 9, an arachnoid cyst was found on the lower right side of his brain.But yesterday, after cutting his hair, I found a piece of his right brain protruding from the bottom, and the right side was hard like a bone when I felt it with my hand.He says he doesn't feel anything, what is it?When he was rechecked on July 5, he said there was no change in the cyst.School will start soon, do I need to take him for another checkup?

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