In June 1992, the lesion I had been worried about in our youngest son Adam's mouth was confirmed to be a local relapse of his histiocytosis. Treatment was radiation to his jaw. He had been treated with radiation before but no photos were taken. This time I wanted to document how involved the process is. Before any treatment to the head or neck can begin, a plaster mask is made, then replicated in acrylic. The mask is made to fit snugly over the face and then to bolt to the treatment bench. The purpose is to keep the patient from moving at all while the beam is on. Treatment maps are drawn on the mask with permanent markers to help align the beam with the affected area. The technicians in the photo are lining everything up. Adam received 10 treatments in total this time around and they worked to produce a lasting remission. I'm glad to have this visual proof of how much he has overcome.