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Prostate MR images (axial T2-weighted on the left and ADC map on the right) from a 76-year-old patient with a PI-RADS 5 transition zone lesion involving the anterior fibromuscular stroma (Gleason score 4+3 and signs of extraprostatic extension of disease at prostatectomy). The slices in which the lesion was more conspicuous are shown respectively before (a and b) and after (c and d) after manual segmentation
