Pheochromocytoma/paraganglioma Syndrome 3, also known as paragangliomas 3, is related to hereditary paraganglioma-pheochromocytoma syndromes and paraganglioma, and has symptoms including aphonia An important gene associated with Pheochromocytoma/paraganglioma Syndrome 3 is SDHC (Succinate Dehydrogenase Complex Subunit C). Affiliated tissues include smooth muscle and prostate, and related phenotypes are paraganglioma and hyperhidrosis