Table 4.
Comparison of features of existing lesions vs. new lesions identified on serial imaging
| Lesion visible on previous MRI | New lesion not visible on previous MRI | p | |
|---|---|---|---|
| Number | 115 | 79 | |
| Size (mm) | 12.28±5.68 | 10.81±4.56 | 0.048 |
| Zone | 0.294 | ||
| Peripheral | 36 (30.3) | 26 (32.9) | |
| Transition | 79 (66.3) | 52 (65.8) | |
| Anterior | 0 (0) | 1 (1.3) | |
| Location | |||
| Apex | 19 (16.0) | 23 (29.1) | 0.010 |
| Mid | 54 (45.4) | 41 (51.9) | |
| Base | 42 (35.3) | 15 (19.0) | |
| PI-RADS (v2.0) | |||
| 1 | 10 (8.7) | 5 (6.3) | 0.122 |
| 2 | 65 (56.5) | 46 (58.2) | |
| 3 | 29 (25.2) | 15 (19.0) | |
| 4 | 8 (7.0) | 13 (16.5) | |
| 5 | 3 (2.6) | 0 (0) |
MRI: magnetic resonance imaging; PI-RADS: Prostate Imaging-Reporting and Data System.