Background: TP53 mutation (TP53mut) and a complex karyotype (CK) were shown to be predictors of poor outcome in mantle-cell lymphoma (MCL). In this study we examined the combined effect of both of these risk factors.
Patients And Methods: Patients diagnosed with MCL between January 2000 and December 2014 (n = 74) were evaluated. Forty-eight of them had available material for TP53 and cytogenetic examination. We analyzed the prognostic effect of combined TP53mut and CK in the cohort of patients treated with rituximab-containing therapy.
Results: Three-year (3-y) overall survival (OS) and 3-y progression-free survival (PFS) in CK patients were shorter compared with non-CK (P = .001 for OS; P = .02 for PFS). TP53mut was a predictor of shorter survival compared with TP53 wild type (OS and PFS; P < .001). The incidence of TP53mut was not significantly associated with CK (P = .240). CK and TP53mut were predictors of inferior PFS and OS independent of age and Mantle-Cell Lymphoma International Prognostic Index, with hazard ratios of 2.35 (P = .024), 4.50 (P < .001) for PFS and 4.31 (P < .001), 5.46 (P < .001) for OS analysis in the CK and TP53mut groups, respectively. The combination of TP53mut and CK status stratified the patients into 3 prognostic groups (P < .001) with the worst outcome in patients with CK and TP53mut.
Conclusion: TP53 mutation and CK occurred independently and patients harboring both had a dismal prognosis. The study suggests the importance of molecular cytogenetics and examination of the TP53mut status to be performed simultaneously before treatment.
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