Anatomical distribution of bone metastases in stage IV breast cancer: According to histological subtype

Table 4 Pathologic and impending fractures according to histological subtypes, n (%)

Pathological fracture	Luminal A (n = 82)	Luminal B (n = 12)	Triple neg (n = 8)	HER 2 enrich (n = 5)	P value
Femoral head and neck	16 (20)	4 (33)	2 (25)	1 (20)	0.75
Spinal vertebrae	12 (15)	1 (8)	0	1 (20)	0.77
Humerus	5 (6)	1 (8)	1 (12.5)	0	0.78
Other1	8 (10)	0	1 (12.5)	0	0.63
Impending hip fracture	29 (35)	6 (50)	3 (37.5)	0	0.28

¹Other includes: Ribs, Tibia, Fibula and Pelvic bones.