Figure 8a.

Prostate cancer in a 64-year-old man with a prostatectomy Gleason score of 4 + 3 (tertiary pattern 5) (the presurgical biopsy score from a single fragmented 30% core was 3 + 3) and a PSA level of 3.4 ng/mL. The final histopathologic analysis showed a dominant nodule in the left posterolateral prostate at the base and midgland, with substantial extraprostatic tumor extension and seminal vesicle invasion at the left base. Endorectal MR imaging was performed at 1.5 T. (a) Coronal T2-weighted image (5000/93) shows concentric wall thickening of the left seminal vesicle (arrows) and dark tumor extending along the left seminal vesicle, findings compatible with seminal vesicle invasion. (b) Sagittal T2-weighted image (2900/92) shows continuity of the dark tumor, which extends from the left base into the left seminal vesicle (arrows).