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Frequency and extent of positive margins by biopsy type.
| Biopsy type | |||||
|---|---|---|---|---|---|
| Excisional | Shave | Punch | Incisional | P value | |
| Any margin positive | 81/187 (43%) | 43/60 (72%) | 63/68 (93%) | 17/17 (100%) | <0.0001 |
| Type of involved margin (s) | <0.0001 | ||||
| Margin not specified | 28/187 (15%) | 10/60 (17%) | 27/68 (40%) | 12/17 (71%) | |
| Lateral margin only | 38/187 (20%) | 14/60 (23%) | 25/68 (37%) | 1/17 (6%) | |
| Deep margin only | 15/187 (8%) | 4/60 (7%) | 1/68 (2%) | 1/17 (6%) | |
| Lateral + deep margins | 7/187 (4%) | 15/60 (25%) | 10/68 (15%) | 3/17 (18%) | |
