Most chromosomal deletions occurring in prostate cancer are linked to either positive (PTEN, 3p, 8p, 16q, 17p) (Krohn et al. 2013; Kluth et al. 2017; Krohn et al. 2012; Kluth et al. 2015b; Kluth et al. 2014) or negative (6q, 5q, 13q, 18q) (Burkhardt et al. 2013; Kluth et al. 2013; Kluth et al. 2018; Kluth et al. 2016) ERG status. The gene discussed is PTEN; the disease is prostate cancer.