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Calculated probability of internal mammary lymph node metastatic involvement in various clinical groups participating in analyzed (randomized and observation) studies.
| Localization of primary tumour | Metastases in axillary LN | Probability of IMLN metastatic invasion (%) |
|---|---|---|
| Internal/central | Yes | 13.3 |
| Internal/central | No | 2.7 |
| External | Yes | 6.1 |
| External | No | 1.2 |
