Diagnosis of high-grade prostatic intraepithelial neoplasia: the impact of the number of biopsy cores at initial sampling on cancer detection after a saturation re-biopsy.

Objectives: To evaluate factors that may predict prostate cancer (PCa) detection after initial diagnosis of high-grade prostatic intraepithelial neoplasia (HGPIN) on 6-24 cores prostatic biopsies (PBx).

Material And Methods: We retrospectively evaluated 193 patients submitted from 1998 to 2007 to prostate re-biopsy after initial HGPIN diagnosis in three urologic departments. HGPIN diagnosis was obtained on initial systematic PBx with 6 to 24 random cores.