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Potential reasons for Gleason undergrading on biopsy
| Saturation Biopsy (N = 19) |
Twelve-core Biopsy (N = 57) |
Total (N = 76) |
||||
|---|---|---|---|---|---|---|
| Unusual locations | 6 | 31.6% | 18 | 31.6% | 24 | 31.6% |
| Anterior only | 4 | 6 | 10 | |||
| Apex only | 1 | 3 | 4 | |||
| Bladder neck only | 0 | 1 | 1 | |||
| Parasagittal only | 1 | 8 | 9 | |||
| Minimal G4 (G4 ≤ 5%) | 6 | 31.6% | 17 | 29.8% | 23 | 30.3% |
| Remaining cases | 7 | 36.8% | 22 | 38.6% | 29 | 38.2% |
