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

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

MRCP features of the stricture Total (n=60) Benign (n=34) Malignant (n=26) Test of sig. P
No. % No. % No. %
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
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
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
  1. χ2 chi-square test, U Mann-Whitney test, p p value for comparing between the two studied groups
  2. *Statistically significant at p ≤ 0.05