Multi-Detector Row Computed Tomographic Appearance of Celiac Ganglia

Objective: To assess the imaging features of celiac ganglia on multi- detector row computed tomography (MDCT). Methods: We retrospectively reviewed 103 consecutive MDCT studies and recorded the frequency of visualization, location, morphologic feature, size, and enhancement pattern of the celiac ganglia. Results: The left celiac ganglion was visualized more often than the right ganglion (89% vs 67%, P <0.0001). Both ganglia were identified at the level between the origins of celiac and superior mesenteric arteries and anterior to the diaphragmatic crura. The ganglia were either multi-lobulated or discoid in shape. The mean long-and short-axis dimensions of the ganglia were larger on the left than right (left: 2.2 [0.4] and 0.4 [0.1] cm; right: 2.0 [0.4] and 0.3 [0.1] cm, respectively, P <0.005). The ganglia had the same CT attenuation as the adjacent adrenal glands on nonenhanced and portal venous-phase images in almost all cases and demonstrated higher attenuation than the adrenal glands in approximately two thirds of the cases on delayed scans. Conclusions: Celiac ganglia can be identified based on their characteristic locations and morphologic features on MDCT.