EPAS1 and pheochromocytoma: <h4>Context</h4>Since the original discovery of the Pacak-Zhuang syndrome (PZS) in 2012, defined by the clinical triad of pheochromocytoma/paraganglioma (PPGL) and/or duodenal ampullar somatostatinoma with erythrocytosis, multiple multisystemic phenotypes have been identified in patients with somatic mosaic pathogenic variants in EPAS1/HIF2A.