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直径≤3 cm和直径＞3 cm病灶与边界的关系
Relationship between edge and lesion size of dia.≤3 cm and > 3 cm
| Size (Diameter) | Lesion | Total | P | |
| Clear | Unclear | |||
| All lesion | ||||
| < 3 cm | 16 | 14 | 30 | 0.235 |
| > 3 cm | 19 | 29 | 48 | |
| Total | 35 | 43 | 78 | |
| Malignant | ||||
| < 3 cm | 15 | 9 | 24 | 0.846 |
| > 3 cm | 15 | 8 | 23 | |
| Total | 30 | 17 | 47 | |
| Benign | ||||
| < 3 cm | 1 | 5 | 6 | 0.970 |
| > 3 cm | 4 | 21 | 25 | |
| Total | 5 | 26 | 31 | |
