answer:Oncologists do blood tests for cancer markers and red and white blood counts. My brother had rapid growing, non-Hodgkin’s Lymphoma that was not diagnosed for several months after symptoms presented but after that it was patently clear. Has the person seen someone at a first-rate Oncology/Haemotology Group? Who thinks that he might have a blood cancer? Did anyone discuss this with his PCP or his endocrinologist. I can’t imagine anyone calling Lymphoma, however it presents, “mild.” People do nap more as they age, of course. If you’re not happy with your doctors, find better ones. Get recommendations from family, friends or your local hospital.