SDHAF2 and hereditary pheochromocytoma-paraganglioma: Only somatic mutations associated with paragangliomas/pheochromocytomas have been detected in the HRAS, ATRX, TP53, and KMT2D genes whereas only germline mutations have been identified in the SDHA, SDHC, SDHAF2, FH, KIF1B, and TMEM127 genes.