MRI diagnosis of adrenal ganglioneuroma

Objective To evaluate the diagnostic value of MR imaging for adrenal ganglioneuroma. Methods MR imaging features and preoperative diagnosis of 7 patients with pathologically-proved ganglioneuroma were retrospectively analyzed. Results Of the 7 patients,6 were diagnosed as benign tumor（neurogenic tumor in 4 patients and ganglioneuroma in 2 patients,respectively） and 1 as malignant tumor.Heterogeneous hyper-intensity signals with a linear or patchy hypointensity inside,moderate hyper-intensity signals,and iso-or hypo-intensity signals were found on T2WI in 5,1,and 1 patient,respectively.Homogeneous hyper-intensity signals and heterogeneous or iso-intensity signals were found on T1WI in 5 and 2 patients,respectively.Dynamic enhancement scanning showed no enhancement on arterial phase image in 5 patients,but mild heterogeneous enhancement on parenchymal phase image in 2 patients,and progressive enhancement on delayed image. Conclusion MR imaging can reveal the characteristics of adrenal ganglioneuroma.