Table 3.
Final distribution of the new histological classification
| Proximal margin (n = 230) | Distal margin (n = 127) | Total (n = 357) | ||||
|---|---|---|---|---|---|---|
| Epithelial | Intramural | Epithelial | Intramural | Epithelial | Intramural | |
| Insufficient (INS) | 51 (22%) | 2 (1%) | 11 (9%) | 1 (1%) | 62 (17%) | 3 (1%) |
| Negative for malignancy (NM) | 115 (50%) | 177 (77%) | 86 (68%) | 101 (80%) | 201 (56%) | 278 (78%) |
| Undetermined lesion (UDL) | 34 (15%) | 15 (7%) | 13 (10%) | 6 (5%) | 47 (13%) | 21 (6%) |
| Positive for malignancy (PM) | 30 (13%) | 36 (16%) | 17 (13%) | 19 (15%) | 47 (13%) | 55 (15%) |