Table 1.

The spread of breast cancer metastasis to different organs.

Metastasis to organs	Spreadability %	Types of intrinsic factors involved in metastasis	References
Bone	67%	Luminal A—79%	[1, 26, 39]
		Luminal B—75%
		HER2+—60%
		Basal-like—40%
Liver	40.8%	Basal-like (TNBC) and HER2+ are more frequent than others	[1, 25, 39]
Lung	36.9%	Luminal A—25%	[32, 34, 39]
		Luminal B—30%
		HER2+—45%
		Basal-like—35%
Brain	12.6%	Luminal A—< 10%	[25, 26, 40]
		Luminal B—10%
		HER2+—30%
		Basal-like—25%
Auxillary lymph nodes	30%–50%	Not specified	[39, 40]
Mamary internal chain lymph nodes	10%–40%
Supraclavicular lymph nodes	1%–4%
Contralateral breast	6%