Table 2A.
Comparison of the presence of architectural patterns in primary and paired thrombi in clear cell renal cell carcinomas with and without a thrombus.
| Thrombus present; Pattern in thrombus Frequency (%) (n = 82) | Thrombus absent; Pattern in kidney Frequency (%) (n = 467) | p-value | |
|---|---|---|---|
| Microcystic | 0 (0.0%) | 175 (37.5%) | <0.0001 |
| Tubular/Acinar | 1 (1.2%) | 141 (30.2%) | <0.0001 |
| Bleeding follicles | 0 (0.0%) | 134 (28.7%) | <0.0001 |
| Compact small nests | 13 (15.9%) | 362 (77.5%) | <0.0001 |
| Large nests | 26 (31.7%) | 256 (54.8%) | 0.0001 |
| Alveolar | 18 (22.0%) | 108 (23.1%) | 0.8155 |
| Papillary/Pseudopapillary | 4 (4.9%) | 36 (7.7%) | 0.3630 |
| Thick trabecular/Insular | 14 (17.1%) | 108 (23.1%) | 0.2240 |
| Solid sheet | 36 (43.9%) | 106 (22.7%) | <0.0001 |