TABLE 1.

Patient and Lesion Characteristics

Lesion no.	Patient age (years)	Clinical indication for MRI	Lesion type	BI-RADS	Maximum lesion size (mm)	Biopsy technique	Excision technique	Core needle biopsy diagnosis	Excision diagnosis	ADC value (× 10−3 mm2/s)
1	64	Screen	Mass	4	5	MRI	Ex	ALH	AAM	1.33
2	63	Known cancer	Mass	4	6	US	Mx	AAM	SA	1.99
3	60	Screen	NME	4	7	MRI	Ex	ADH	SA, UDH	1.67
4	51	Screen	Mass	4	7	US	Ex	ADH	UDH	1.14
5	38	Screen	Mass	4	9	MRI	Lx	LCIS	LCIS	1.62
6	39	Screen	NME	4	22	MRI	Ex	ALH	ALH	1.33
7	47	Known cancer	NME	4	96	MRI	Ex	LCIS	LCIS	1.75
8	54	Known cancer	NME	4	32	US	Ex	ALH	LCIS	0.96
9	57	Known cancer	NME	4	15	MRI	Ex	ALH	LCIS	1.6
10b	54	Known cancer	Mass	5	11	MRI	Ex	ADH	UDH	1.34
11b	54	Known cancer	Mass	5	7	MRI	Ex	ADH	ALH	1.32
12b	54	Known cancer	NME	4	98	MRI	Ex	LCIS	LCIS	1.71
13	54	Screen	Mass	4	8	US	Ex	LCIS	LCIS	1.39
14	43	Screen	Mass	4	12	MRI	Ex	LCIS	LCIS	1.35
15	49	Known cancer	Mass	4	8	MRI	Ex	Radial Scar	ADH	1.48
16	57	Screen	NME	4	7	MRI	Ex	ADH	ADH, SA	1.27
17	54	Known cancer	Mass	4	7	MRI	Ex	ALH	ALH	2.13
18a	59	Known cancer	Mass	4	11	MRI	Mx	ADH	DCIS	1.24
19a	66	Known cancer	NME	4	35	MRI	Ex	ADH	DCIS	0.88
20a	50	Known cancer	NME	4	11	MRI	Lx	LCIS	DCIS	0.92
21c,a	69	Problem Solving	Mass	4	13	MRI	Ex	LCIS	ILC	0.91
22c,a	69	Problem Solving	NME	4	97	MRI	Ex	LCIS	ILC	1.53
23a	38	Known cancer	Mass	4	42	MRI	Mx	ADH	IDC	1.55

^aLesions that upgraded to malignant on surgical excision.

^bLesions 10, 11, and 12 were detected in a single patient.

^cLesions 21 and 22 were detected in a single patient.

AAM, atypical apocrine metaplasia; ADH, atypical ductal hyperplasia; ALH, atypical lobular hyperplasia; Ex, excisional biopsy; IDC, invasive ductal carcinoma; ILC, invasive lobular carcinoma; LCIS, lobular carcinoma in situ; Lx, lumpectomy; Mx, mastectomy; NME, nonmass enhancement; SA, sclerosing adenosis; UDH, usual ductal hyperplasia; US, ultrasound.