Figure 4.

Small recurrence in the left side of the prostate surgical bed. The patient's status is post radical prostatectomy with a recent elevation of prostate-specific antigen to 0.21 ng ml⁻¹. (a) Axial T₂ weighted imaging shows a small mass with slightly high T₂ signal (solid arrow) relative to the adjacent muscle (open arrow) in the left side of the prostate surgical bed. Bladder neck (BN) is noted. (b) Dynamic contrast-enhanced imaging shows the lesion with rapid contrast wash-in and wash-out (arrow) consistent with focal recurrence.