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Fig. 5A 56-year-old man with Gleason grade 7 prostate cancer 86 months after
retropubic radical prostatectomy. B = bladder, R = rectum, M = muscles.
T2-weighted axial (A) and coronal (B) endorectal-coil MR images
show bilaterally symmetric low-signal-intensity masses situated where tips of
seminal vesicles were presurgically. These masses are suggestive of retained
tips of seminal vesicles (arrows) and show low signal intensity
similar to that of adjacent pelvic muscles, suggestive of fibrosis. As seminal
vesicles undergo fibrosis, they tend to pull down along lateral rectal wall.
Low signal intensity, bilaterality, and symmetry of these remnants distinguish
them from local recurrence of prostate cancer.