Fig. 2

A 51-year-old patient with low-volume Gleason score 3 + 3 = 6 at non-targeted TRUS-guided biopsy. MP-MRI was performed at onset of active surveillance (AS) to exclude higher grade tumour. Axial (a) and sagittal (b) T2W images demonstrate an ill-defined ovoid lesion of low T2 SI at the junction of the right PZ and transition zone (TZ) (dotted white arrow) along the course of the surgical capsule. Axial ADC map image (c) at the same level demonstrates corresponding low SI (white arrow). This area was considered suspicious for tumour. Targeted TRUS biopsy was performed and yielded only normal prostate tissue. The area did not change on follow-up MP-MRI and represents asymmetry of the normal central zone. In retrospect, corresponding b1000 mm²/s trace EPI (d) did not show increased signal (white arrow) in this area