Has anyone else come across patients receiving daratumumab where the DTT treated screen is still reactive? I work at a reference lab in a large hospital with a very large population of multiple myeloma patients and have come across 3 such patients. We have tested DTT treated panels and usually see panreactivity give or take a cell or 2 every now and then. In all 3 the plasma was non-reactive with untreated cord cells, autologous cells and red cells from a few other patients receiving dara. Interestingly when we DTT treated the cord cells, AC and cells from other dara patients, we got posit