Table I.
Clinical characteristics of patients with RCC.
| Variables | Frequency | Percent (%) |
|---|---|---|
| Age (years) | ||
| Median age (range) | 60 (40–79) | |
| Sex | ||
| Female | 100 | 50.0 |
| Male | 100 | 50.0 |
| Tumor grade | ||
| I | 70 | 35.0 |
| II | 122 | 61.0 |
| III | 8 | 4.0 |
| TNM stage | ||
| T1aN0M0 | 72 | 36.0 |
| T1bN0M0 | 98 | 49.0 |
| T2aN0M0 | 23 | 11.5 |
| T3aN0M0 | 7 | 3.5 |
| Pathological type | ||
| Clear cell RCC | 166 | 83.0 |
| Papillary RCC | 34 | 17.0 |
| Surgical | ||
| NSS | 135 | 67.5 |
| RN | 65 | 32.5 |
| CTC | ||
| Positive | 90 | 45.0 |
| Negative | 110 | 55.0 |
RCC, renal cell carcinoma; T, tumor; N, node; M, metastasis; NSS, nephron-sparing surgery; RN, radical nephrectomy; CTC, circulating tumor cells.