Fig. 17
From: Solid malignant retroperitoneal masses—a pictorial review
Imaging of paraganglioma. A 43-year-old woman with family history of paraganglioma. Her 24-h urine normetanephrine and norepinephrine levels were elevated. a A well-defined enhancing mass with central necrosis (arrow) was seen in the right retroperitoneum. The right adrenal was normal. Axial T2-weighted image (b) shows hyperintense signal (arrow), while post gadolinium T1-weighted MRI image (c) shows intense enhancement (arrow)