TP53 and diffuse large B-cell lymphoma: Analysis of the loss of heterozygosity of TP53 was performed on 24 tumor samples of DLBCL in our study population, and 13 of them were found to have mutations, whereas 11 did not have changes in the sequences of TP53. Our investigation of microsatellite marker D17S796, which is located near TP53, detected 6 (25%) cases of loss of heterozygosity, in agreement with the literature data [27].