Abstract #1341

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

Mengda Jiang¹, Yongchuan Chai², Yang Song³, and Xiaofeng Tao¹

¹Department of Radiology, Shanghai Ninth People’s Hospital, affiliated to Shanghai Jiaotong Universit, ShangHai, China, ²Department of Otolaryngology, Head & Neck Surgery, Shanghai Ninth People’s Hospital, affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China, ³MR Scientific Marketing, Siemens Healthcare, Shanghai, China

Synopsis

Keywords: Head & Neck/ENT, Nerves, Geniculate Ganglion, Facial NerveTo 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%).

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