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. The gene discussed is MKI67; the disease is mantle cell lymphoma.