My son lost vision in his left eye (at age 12). At age 27, he experienced worsening symptoms that finally led to the diagnosis of 3 meningiomas that had been growing for years. He had 30 proton beam radiation sessions, and now we wait to see if the tumors are dead. Due to the location of the tumors, they are inoperable. Unfortunately, at age 12, when he first had the MRIs, they missed the tumors. I regret that we didn't push more to find a diagnosis. He's had many health issues over the years, and now we are learning why. It's been difficult.