Scheffers J, Haan LT- de, Kret E, van der Poel M, Jak M, van Dorp S, Mutsaers P, Kranenburg F, Koens L, Kersten MJ, Diepstra A, van Meerten T, Dekker TJ, Vermaat JS. Recurrent oral ulceration after CD19 CAR T-cell therapy defines a delayed mucosal inflammatory phenotype. Haematologica; https://doi.org/10.3324/haematol.2026.301117 [Early view].