P53 deletion is independently associated with increased age and decreased survival in a cohort of Chinese patients with diffuse large B-cell lymphoma

Abstract

The purpose of the study was to compare cytogenetic profiles and survivals between elderly and non-elderly Chinese patients with diffuse large B-cell lymphoma (DLBCL). We identified 50 patients with DLBCL and divided them by age into elderly (≥60 years) and non-elderly (< 60 years) groups. We detected deletion of P53 or translocations in Bcl-2, Bcl-6 or c-myc genes by fluorescence in situ hybridization (FISH). P53 deletion was significantly more common in elderly versus non-elderly patients (62% vs. 17%, respectively, p=0.001) There were no significant differences in rates of Bcl-2, Bcl-6 or c-myc gene rearrangements between elderly and non-elderly patients (p>0.25 for each). Median survival was significantly longer in non-elderly compared to elderly patients. P53 deletion was an independent prognostic factor for decreased survival in patients with DLBCL, independent of age. In conclusion, P53 deletion as detected by FISH is associated with both increased age and decreased survival in Chinese patients with DLBCL. This association with decreased survival is at least partly independent of age. P53 deletion could serve as a prognostic factor in DLBCL independent of or in combination with age.