Furthermore, the authors explored p53 codon 72 polymorphism in the same patients and found the distribution of three genotypes namely Arg/Arg, Arg/Pro, and Pro/Pro to be 69.6, 21.7, and 8.7%, respectively in the PCa group, and 75.0, 17.86, and 7.14%, respectively in the healthy control group. The gene discussed is TP53; the disease is posterior cortical atrophy.