Germline mutation testing was negative for suspected polycythemia/PPGL syndrome and other hereditary PPGL using the Invitae 14 gene panel, which included MAX, NF1, RET, SDHA, SDHAF2, SDHB, SDHC, SDHD, TMEM127, VHL, EGLN1, FH, KIF1B, and MEN1. Additionally, the germline EPAS-1 single gene analysis was negative. This evidence concerns the gene EPAS1 and polycythemia.