In low BMI populations, 3 polymorphisms in 3 genes (XPC, Vavs, PRKCI) were considered to decrease the risk of PCa (OR = 0.51–0.78, lowest: PRKCI rs4955720 C > A) [25, 29, 31, 37, 50], while some SNPs in mTOR and GAS5 were considered to increase the risk (OR = 1.29–3.89, highest: GAS5 rs17359906G > A) [16, 31, 50]. The gene discussed is XPC; the disease is posterior cortical atrophy.