Figure 9b. Cystic change in paraganglioma in a 38-year-old woman with hypertension. (a) Contrast-enhanced CT scan shows a cystic mass with irregular walls in the right anterior pararenal space (arrow). (b) Photomicrograph (original magnification, x200; H-E stain) shows that the tumor consists of nests of monotonous round to polygonal cells with amorphous and granular cytoplasm and has a delicate capillary network.