Table 2: PI-RADS scoring system for T2WI—transition zone.

PI-RADS score Criteria

1 Heterogeneous transition zone adenoma with well-defined margins: “organized chaos”
2 Areas of more homogeneous low signal intensity, however well-marginated, originating from the transition zone/BPH
3 Intermediate appearances not in categories 1/2 or 4/5
4 Areas of homogeneous low signal intensity, ill defined: “erased charcoal drawing sign”
5 Same as 4, but involving the anterior fibromuscular stroma sometimes extending into the anterior horn of the peripheral zone, usually lenticular or water-drop- shaped