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Patient characteristics.
| Characteristics | Value |
|---|---|
| Gender, n | |
| Male/female | 7/1 |
| Median age (range), years | 65 (52–78) |
| Tumor location, n | |
| Upper/middle/lower | 2/4/2 |
| Depth of tumor, n | |
| cT2/cT3 | 3/5 |
| Lymph node metastasis, n | |
| cN0/cN1/cN2/cN3 | 2/3/2/1 |
Tumor location, depth of tumor and lymph node metastasis were based on the 7th edition of the Union for International Cancer Control tumor-node-metastasis classification guidelines (11).
