Table 1

 Neoplastic processes involving prostatic ducts and their main differential diagnosis

Prostatic intraepithelial neoplasia
    Atypical basal cell hyperplasia
    Prostatic adenocarcinoma (acinar)
    Prostatic ductal adenocarcinoma
Prostatic ductal adenocarcinoma
    Prostatic acinar adenocarcinoma, including pseudohyperplastic adenocarcinoma
    Prostatic invasion by rectal adenocarcinoma
    Verumontanum hyperplasia
Intraductal carcinoma
    Cribriform prostatic intraepithelial neoplasia (PIN)
    Cribriform pattern 3 acinar adenocarcinoma
    Urothelial cell carcinoma with comedonecrosis
Urothelial carcinoma (primary or secondary)
    Intraductal carcinoma