Table 2.

Clinical and pathologic data of the serum samples.

Pathology (number)	Mean age years (range)	Hormone receptor status	HER2 receptor status	Stage
Control (43)	42 (18–74)
Benign (12)	56 (18–78)
Fibroadenoma (36)	54 (25–78)
Hyperplasia (12)	56 (55–78)
DCIS (59)	56 (34–82)	13 HR+
		1 HR−
		45 UNK
IBC (37)	53 (30–74)	6 HR+ (1 HR+ HER2−)	2 HR-HER2+ 5 HR+ HER2+ 4 UNK HR HER2+ 4 HR+ HER2−	Stage I 10
		5 HR− (3 HR− HER2−)		Stage II 14
		26 UNK	22 UNK	Stage III 5
				Stage IV 8

UNK unknown, HR+ (ER+ PR+/ER+ PR−/ER− PR+), HER2+ (IHC 3+ or 2+ with FISH amp of HER2-neu), staging per AJCC 7. All serum samples were taken from women.