Imaging-based algorithmic approach to gallbladder wall thickening

Table 4 Features of magnetic resonance imaging which help in differentiation of benign and malignant gallbladder wall thickening

MRI findings	Benign wall thickening	Malignant wall thickening
Pattern of thickening	On T2, thin hypointense inner layer and thick hyperintense outer layer or multiple T2 hyperintense foci in wall	Diffuse nodular thickening without layering
Dynamic contrast enhancement	Relatively slow enhancement	Early enhancement
Diffusion restriction	High ADC value and low lesion to spinal cord ratio	Low ADC value and high lesion to spinal cord ratio

MRI: Magnetic resonance imaging; ADC: Apparent diffusion coefficient.