Comparison of false positive rates for screening breast magnetic resonance imaging (MRI) in high risk women performed on stacked versus alternating schedules

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Table 4 Characteristics of breast cancers diagnosed in cohort

Preceding MRI type	MRI BI-RADS category	MRI cycle #	Biopsy result	Breast cancer risk factor
Stacked	4	1	0.8 cm MD IDC, LN -, ER/PR+, HER 2-	Hx of LCIS
Alternating	5	3	0.7 cm MD ILC, LN-, ER/PR +, HER 2-	BRCA 2 carrier
Alternating	0	5	0.6 cm MD ILC, LN-, ER+, PR+	BRCA 2 carrier
Interval cancer		5	2.4 cm PD IDC, LN+, ER+, PR-, HER 2 -	BRCA 1 carrier

Abbreviations: MD = moderately differentiated, PD = poorly differentiated, IDC = infiltrating ductal carcinoma, ILC = infiltrating lobular carcinoma, LN = lymph node, ER = estrogen receptor, PR = progesterone receptor.