This is quite possibly due to most of these patients already receiving DNA-damaging chemo before CAR-T therapy. It also represents only 20 cases out of tens of thousands of doses.
myasthenia gravis patients already get chemo therapy to destroy their immune cells as part of the infusion protocols. That is a treatment and is not curative. If CAR-T works on MG, then it’s not the chemo that’s doing it.