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病灶性质与边界关系（例/百分比）
Relationship between lesion property and edge (n/%)
| Final diagnosis of lesions | Edge | Total | |
| Clear | Unclear | ||
| χ2 test, P < 0.001. The sensitivity of diagnosis by clear lesion edge was 71.4% (30/42). Specificity was 72.2% (26/36). | |||
| Benign | 5 (6.4) | 26 (33.3) | 31 |
| Malignant | 30 (38.5) | 17 (21.8) | 47 |
| Total | 42 (44.9) | 36 (55.1) | 78 |
