Figure 3. A 71-year-old man suspected to have prostate cancer based on a border-line elevation of prostate-specific antigen (9.6 ng ml^-1) Only one biopsy core was positive in the right peripheral zone. Gleason score=4+4. (a) Transrectal ultrasound (left) and power Doppler ultrasound (right) of the prostate gland. No abnormal echoic lesions are visible. An intensely, focal abnormal Doppler signal is observed in the apex of the right peripheral zone (arrow). The Doppler signal in the ventral part of the prostate gland is an anterior prostatic venous plexus (asterisk). (b) T₂ weighted turbo spin echo image (4700/120) shows an equivocal low intensity lesion in the apex of the right peripheral zone (arrow). (c) The source image of dynamic contrast-enhanced MRI shows focal early enhancement in the right-sided apex (arrow). (d) Region of interest is superimposed on the source image for the right apex hypervascular lesion. (e) The time intensity curve from the lesion shows early, intense enhancement and was classified as Type A. The time intensity curve of the left peripheral zone shows delayed enhancement with no signal peak and was classified as Type C.