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. 2019 Feb 28;26(5):552–561. doi: 10.1007/s12282-019-00955-6

Table 3.

Detection rates on mammography and MRI

Density on MMG	BRCA1 (n = 30)		BRCA2 (n = 29)
Density on MMG	Detection rate of MMG	Detection rate of MRI	Detection rate of MMG	Detection rate of MRI
Entirely fatty	None	None	None	None
Fibroglandular density	80.0 (4/5)	100.0 (5/5)	100.0 (2/2)	100.0 (2/2)
Heterogeneously dense	84.6 (11/13)	100.0 (13/13)	92.9 (13/14)	100.0 (12/12)^a
Extremely dense	75.0 (9/12)	100.0 (12/12)	84.6 (11/13)	84.6 (11/13)^b

^aTwo BRCA2 tumors were excluded because MRI evaluations were performed after vacuum-assisted breast biopsies

^bTwo lesions which were undetectable by MRI were diagnosed by contralateral risk-reducing mastectomy