Abstract：Objective: To improve recognition of posterior mediastinal ganglioneuroma(PMGN). Materials and Methods: Clinical and imaging materials(five cases were performed CT only, one case was underwent MR only, and four cases were performed both CT and MR scans) of 10 cases histologically proved PMGN were analyzed retrospectively, additionally, CT and MR findings were summarized. Results: On images, vertical diameters of the PMGNs were bigger than both of anteroposterior and transverse diameters, and tumors grew along the vertebrae. Moreover, we classified PMGNs in our study into vertebral canal-associated(n=1) and non-vertebral canal-associated(n=9) GN on the basis of adjacent vertebral canal involved or not. Additionally, we grouped them into unilateral type(n=7) and acrossing middle-line type(n=3) according to the growth pattern. On plain CT, GNs were showed homogeneous or heterogeneous hypointense, scattering punctate calcification and patchy fat-density were seen in one case, respectively. There were non-enhancement or mild to moderate homogeneous or heterogeneous enhancement on enhanced CT. On MRI, T1WI showed homogeneous low signal and T2WI demonstrated obvious heterogeneous high signal intensity. With contrast material, there was heterogeneous enhancement or non-enhancement. Conclusions: PMGNs have some characteristics on CT and MR, we should make right diagnosis after thoroughly analysis.
2011, Vol. 22 
