Percentage of tumour metastatic deposits to the whole size of the involved lymph node (tumour burden) in both invasive lobular carcinomas and invasive ductal carcinoma subtypes
| Tumour burden (%) | Invasive ductal carcinoma (n=219) | Invasive lobular carcinomas (n=27) | p Value |
| <10 | 65 (29.7%) | 4 (14.8%) | |
| 10–25 | 30 (13.7%) | 7 (25.9%) | |
| 26–50 | 41 (18.7%) | 3 (11.1%) | 0.317 |
| 51–75 | 22 (10.0%) | 3 (11.1%) | |
| 76–90 | 51 (23.3%) | 8 (29.6%) | |
| 91–100 | 10 (4.6%) | 2 (7.4%) |