Table 2: Organ-specific metastases in different subtypes of breast cancer (the two most common sites of metastases within each breast cancer subtype is depicted in bold).

ER (n = 111) ER/HER (n = 25) HER (n = 20) TN (n = 45)
Bone 20 (18.0%) 7 (28.0%) 4 (20.0%) 6 (13.3%)
Liver 6 (5.4%) 6 (24.0%) 5 (25.0%) 8 (17.8%)
Lung 10 (9.0%) 3 (12.0%) 5 (25.0%) 14 (31.1%)
Brain 1 (0.9%) 1 (4.0%) 0 (0.0%) 2 (4.4%)
Mediastinum/Pleura 1 (0.9%) 0 (0.0%) 1 (5.0%) 9 (20.0%)
Extra-axillary nodes 3 (2.7%) 0 (0.0%) 0.0% 18 (7.8%)
Other 3 (2.7%) 1 (4.0%) 0.0% 3 (6.7%)
(Equivocal) 17 (15.3%) 5 (20%) 4 (20%) 3 (6.7%)