The scar across the top of Paul F. Thomas’ head is located such that he can’t see it when he looks in the mirror. Not that he needs to be reminded of the surgery that left metal sutures “like a railroad track” embedded in his head, he said.

He still has fresh memories of the tumor’s removal, followed by chemotherapy and the fatigue that turned normally simple tasks, such as walking from the car to the office, into great chores.