Retroperitoneal Ganglioneuroma

A 10-year boy presented with a painless swelling in the left upper abdomen which gradually increased in size. Physical examination revealed a non tender, smooth, firm and an irregular mass in left hypochondrium extending to left lumbar region. On ultrasound, a hypoechoic lesion (14cm x10cm) in left suprarenal region was noted. Computed tomography (CT) revealed a large (18cm x 12cm) lobulated hypo-dense lesion with linear hyperdense enhancing areas in the left suprarenal region.