Table 1.

Clinical data of the four bone metastasis breast cancer cases.

	Case 1	Case 2	Case 3	Case 4
Gender	Female	Female	Female	Female
Age	46	66	71	46
Pathology subtypes	Invasive ductal carcinoma	Invasive ductal carcinoma	Invasive lobular carcinoma	Invasive ductal carcinoma
Pathological grade	III	III	III	III
Molecular subtypes	Luminal B	Luminal B	Luminal B	Luminal B
TNM stage, tumor max diameter (cm)	IV, T: 2.2	IV, T: 2.5	IV, T: 3.3	IV, T: 3.7
Location of metastasis	Acetabular bone; axillary lymph node	Thighbone	Humerus; femur; liver; axillary lymph node	Blade bone; thighbone; axillary lymph node
Remote metastasis organ number	One	One	Three	Two