I'm not sure why they are doing the additional 3 months. Perhaps to knock out any stragglers. Thinking it had spread to other areas of my body. Originally they thought I had multiple nodes involved in my neck. Almost all from my clavicle up. The PET just showed 1 with no spread to the rest of my body. My other nodes were doing what they were supposed to be doing by fighting the cancer off, which might explain their swelling. That was his original prescription. Guess I'll see what happens as time goes along.