TP53 and mantle cell lymphoma: MCL international prognostic index (MIPI), Ki-67 index (<30% vs >30%), p53 by IHC,TP53 deletions/mutations by sequencing analysis.6 The MIPI is a tailored prognostication index for MCL, based on four independent prognostic factors: age, performance status, LDH, and leukocyte count.10 We could not evaluate MIPI in this study, as none of the necessary factors were documented in the patient files.