SDHAF2 and adrenal gland pheochromocytoma: His germline DNA was analyzed by NGS using a custom endocrine tumor panel which includes 11 major susceptibility genes for familial PCC/PGL (PHD2, KIF1Bβ, SDHA, SDHB, SDHC, SDHD, SDHAF2, VHL, MAX, TMEM127 and RET).