Kevin--My husband was diagnosed in 2009 with a rare Hodgkin lymphoma, Nodular Lymphocyte Predominant, which in 20 percent of cases transforms into a B-Cell non-Hodgkin's. His did in autumn 2015 (T-Cell Rich B-Cell). The affected nodes for both were two of his mesenteric nodes on the right side of his body. He had R-CHOP, refractory R-Chop, and an autologous stem-cell transplant at Mayo's in Nov-Dec 2016. The cancer was back by his 100-day checkup in March 2017, but, for some inexplicable reason, it didn't grow as fast as usual. By the time the FDA approved his type of CAR-T (not a trial) in Nov 2017, he was completely asymptomatic and the mass was still not large enough to biopsy. When it was finally time to biopsy in March 2018, docs thought it might actually be the Hodgkin's returning! It really was acting more like that. But it was the non-Hodgkin's. That's when (YESCARTA) CAR-T was recommended. Have you considered a second opinion from Mayo's?