Juxtaglomerular Cell Tumor
Section Editor: Dharam M. Ramnani, MD
Virginia Urology, Richmond, VA, USA
Image Description
Juxtaglomerular Cell Tumor: Electron microscopy reveals characteristic rhomboid or trapezoid electron-dense membrane-bound granules within the cisterns of Golgi complex in juxtaglomerular cell tumors. These structures represent immature renin "protogranules." The more mature granules in the cytoplasm have round or irregular shapes.