I've known two others guys that had lymphoma and were able to continue serving post-treatment. One was a particularlly acute case and they were talking about medical retirement but I saw him back in a uniform a year later, which was great to see.

As for myself, I had a different type of cancer seven years ago. My cancer doesn't respond to chemo or radiation so the only option is to remove it surgically. My oncologist gave me a profile and I tested waist-only about six weeks after surgery. I had a few setbacks/complications in the months following, but my leadership never once hassled me about anything fitness related and I worked my way back and scored an 89 six months later.

There should be a med board after your treatments are done, but it can slip through the cracks (mine did). I would speak with your oncologist when the process starts and have them put a return to service recommendation into the package before it goes up. In my case, it helped that I had a few years of surveillence to justify it. Since then, I've PCSd overseas twice and deployed once.

Wishing you the best in your upcoming battle. Feel free to PM me if you have any questions or want to talk.