The role of combined diffusion weighted imaging and magnetic resonance cholangiopancreatography in the differential diagnosis of obstructive biliary disorders

Egyptian Journal of Radiology and Nuclear Medicine

Table 5 Comparison between the two studied groups according to MRCP features of the stricture

MRCP features of the stricture	Total (n=60)		Benign (n=34)		Malignant (n=26)		Test of sig.	P
MRCP features of the stricture	No.	%	No.	%	No.	%	Test of sig.	P
Length (mm)
Min.–Max.	3.0–40.0		3.0–26.0		7.0–40.0		U = 70.0*	< 0.001*
Mean ± SD.	14.28 ± 9.60		8.34 ± 5.62		22.04 ± 8.08
Median (IQR)	12.0 (6.0–23.0)		6.0 (5.0–10.0)		23.0 (15.0–26.0)
Borders
Symmetrical	30	50.0	30	88.2	0	0.0	χ²=45.882*	< 0.001*
Asymmetrical	30	50.0	4	11.8	26	100.0	χ²=45.882*	< 0.001*
Lumen
Regular	37	61.7	33	97.1	4	15.4	χ²=41.576*	< 0.001*
Irregular	23	38.3	1	2.9	22	84.6	χ²=41.576*	< 0.001*
Transition
Gradual tapering	30	50.0	27	79.4	3	11.5	χ²=27.149*	< 0.001*
Abrupt narrowing	30	50.0	7	20.6	23	88.5	χ²=27.149*	< 0.001*

χ² chi-square test, U Mann-Whitney test, p p value for comparing between the two studied groups
*Statistically significant at p ≤ 0.05