Table 4. Distribution of ductal morphology: ductal curvature index classification versus ductal tortuosity index scheme.

TI	DCI				Total
	Class I	Class II	Class III	Class IV
Type I	19 (100%)	0	0	0	19
Type II	0	19 (100%)	17 (94.4%)	3 (20%)	39
Type III	0	0	1 (5.5%)	12 (80%)	13

TI, tortuosity index; DCI, ductal curvature index.