Imaging-based algorithmic approach to gallbladder wall thickening

Table 3 Features of computed tomography which help in differentiation of benign and malignant gallbladder wall thickening

CT findings	Benign wall thickening	Malignant wall thickening
Patterns of enhancement	Single layer: Homogenous enhancement; two layered patterns: Inner layer isoattenuating to liver	Single layer: Strongly heterogeneously enhancing; two layered patterns: Inner layer enhancing in arterial phase and isoattenuating in venous phase
Biliary obstruction	Not seen	More likely to be seen
Regional lymphadenopathy	Not present	Present
Infiltration into liver	Not seen	May be present

CT: Computed tomography.