Intraductal carcinoma of the prostate is an aggressive form of invasive carcinoma and should be graded. - Samaratunga H; Delahunt B; Egevad L; Srigley JR; Billis A; Bostwick DG; Camparo P; Cheng L; Clouston D; Denham J; Furusato B; Hartmann A; et al. (Pathology, 2020)