TABLE 1.

Imaging Characteristics and Histological Results of 17 Lesions

Case No.	Conventional Imaging Findings				MRI Findings					Surgical Pathologic Findinigs
	MG Findings	US Findings	Bi-RADS	Size ≥0.7cm (over) or <0.7cm (under)	Non mass Enhancement		Signal Intensity Curve		Bi-RADS	Histologic Type, Grade
					Distribution	Internal Enhancement	Initial Phase	Delayed Phase
1	grouped amorphous calcs	NA	4a	over	linear	clumped	rapid	plateau	4	DCIS grade 2
2	grouped amorphous calcs	NA	4b	over	linear	clumped	medium	plateau	4	DCIS grade 1
3	grouped amorphous calcs	occult	4b	under	NA	NA	NA	NA	1	UDH
4	grouped heterogeneous calcs	occult	4b	under	NA	NA	NA	NA	2	ADH
5	grouped amorphous calcs	occult	4b	over	focal	heterogeneous	rapid	plateau	4	DCIS grade 1
6	grouped amorphous calcs	NA	4a	under	NA	NA	NA	NA	2	ADH
7	grouped coarse heterogeneous calcs	NA	4c	under	NA	NA	NA	NA	2	ALH
8	grouped amorphous calcs	NA	4c	over	linear	clumped	slow	persistent	4	IDC grade 1
9	grouped coarse heterogeneous calcs	NA	4c	under	focal	heterogeneous	rapid	plateau	4	DCIS grade 2
10	grouped coarse heterogeneous calcs	hypaechoic mass	4b	over	linear	clumped	rapid	plateau	4	DCIS grade 2
11	grouped amorphous calcs	NA	4a	under	NA	NA	NA	NA	1	ADH
12	grouped amorphous calcs	NA	4c	under	NA	NA	NA	NA	2	ADH
13	grouped coarse heterogeneous calcs	occuit	4b	over	NA	NA	NA	NA	2	FEA
14	segmental amorphous calcs	NA	4b	over	linear	clumped	slow	persistent	4	DCIS grade 2
15	focal asymmetry	hypoechoic mass	4b	over	focal	homogeneous	rapid	washout	4	ADH, papilloma
16	segmental amorphous calcs	hypoechoic mass	4b	over	segmental	clumped	rapid	plateau	4	IDC grade 1
17	grouped amorphous calcs	NA	4a	over	focal	homogeneous	medium	washout	4	DCIS grade 1

calcs: calcifications, NA: not available, UDH: usual ductal hyperplasia, ADH: atypical ductal hyperplasia, ALH: atypical lobular hyperplasia, FEA: flat epithelial atypia, DCIS: ductal carcinoma in situ, IDC: invasive ductal carcinoma