VI in relation to stage
| Study results | ||||||||
|---|---|---|---|---|---|---|---|---|
| Intramural VI | Extramural VI | Overall VI | Extramural in original report | |||||
| *p<0.05; **p<0.01; ***p<0.001 by χ2 test. | ||||||||
| H&E, haematoxylin and eosin; VI, venous invasion. | ||||||||
| Stage | N | H&E (%) | Elastica (%) | H&E (%) | Elastica (%) | H&E (%) | Elastica (%) | H&E (%) |
| Dukes’s A | 5 | – | – | – | – | – | – | |
| Dukes’s B | 27 | 0(0) | 12 (44) *** | 4 (15) | 9 (33) * | 4 (15) | 14 (52) *** | 1 (4) |
| Dukes’s C | 30 | 5 (17) | 12 (40) ** | 6 (20) | 13 (43) ** | 9 (30) | 19 (63) *** | 9 (30) |
| Dukes’s D | 13 | 3 (23) | 6 (46) | 8 (61) | 10 (77) | 8 (62) | 10 (77) | 4 (31) |
| Total | 75 | 8 (11) | 30 (40) *** | 18 (24) | 32 (43) *** | 21 (27) | 43 (57) *** | 14 (19) |