1. Grignon DJ . Unusual subtypes of prostate cancer. Mod Pathol 2004;17:316–327.
2. Humphrey PA . Variants of prostatic carcinoma (Chapter 17). In: Prostate Pathology ASCP Press: Chicago, 2003, pp 390–400.
3. Yang XJ, Cheng L, Helpap B, et al. Ductal adenocarcinoma In: Eble JN, Sauter G, Epstein JI, Sesterhenn IA, (eds) Tumours of the Urinary System and Male Genital Organs. IARC Press: Lyon, France, 2004, pp 199–201.
4. Young RH, Srigley JR, Amin MB, et al (eds). Variants of prostatic adenocarcinoma, other primary carcinomas of prostate, and secondary carcinomas (Chapter 5) and miscellaneous tumors of the prostate (Chapter 6). In: Tumors of the Prostate Gland, Seminal Vesicles, Male Urethra, and Penis, Third Series, Fascicle 28. Armed Forces Institute of Pathology: Washington DC, 2000;217–288.
5. Bock BJ, Bostwick DG . Does prostatic ductal adenocarcinoma exist? Am J Surg Pathol 1999;23:781–785.