Type 2 dynamic curves: A diagnostic dilemma

Table 1 Histopathological results of lesions with type 2 curves

	Histopathological diagnosis	n (%)
Benign 12/38 (31.6%)	Sclerosing adenosis	7 (18.4)
	Fibroadenoma	3 (7.9)
	Intraductal papilloma	1 (2.6)
	Usual ductal hyperplasia	1 (2.6)
Malignant 26/38 (68.4%)	Ductal carcinoma in situ	7 (18.4)
	Invasive ductal carcinoma	15 (39.5)
	Invasive lobular carcinoma	4 (10.5)
Total		38 (100)

Table 2 Breast Imaging Reporting and Data System categories of lesions

BI-RADS category	n (%)
BI-RADS-0	0
BI-RADS-1	0
BI-RADS-2	0
BI-RADS-3	8 (21)
BI-RADS-4	18 (47.4)
BI-RADS-5	12 (31.6)
Total	38 (100)

BI-RADS: Breast Imaging Reporting and Data System.

Table 3 Sensitivity and specificity values obtained by combining type 2 curves and morphological features for predicting malignancy

	Sensitivity	Specificity
Type 2 dynamic curve	40.2	73.4
Type 2 dynamic curve + BI-RADS 3 category	41.9	75.8
Type 2 dynamic curve + BI-RADS 4 category	95.3	97.7
Type 2 dynamic curve + BI-RADS 5 category	100	100

BI-RADS: Breast Imaging Reporting and Data System.