Identifiy geniculate ganglion venous malformation from geniculate ganglion schwannoma using dynamic contrast-enhanced MRI

To evaluate the CT and MRI findings to identify geniculate ganglion venous malformation (GGVM) and geniculate ganglion schwannoma (GGS). Clinical data, lesion size, involvement of facial nerve (FN) segment, signal intensity, homogeneity, the enhancement pattern on DCE-MRI, characteristics of bone destruction on HRCT were evaluated. Lesion size, involvement of FN segment, T1W and T2W intensity, and homogeneity on DCE-MRI were statistically different between them. For regression model, the “honeycomb” sign and “point-to-side” enhancement pattern were independent risk factor (AUC=0.975, accuracy=97.70%, sensitivity=95%, specificity=100%, PPV=100%, NPV=95.80%).