Next-generation sequencing (ENDOGEN panel, Illumina MiSeq device) of DNA prepared from peripheral blood leukocytes revealed no pathogenic mutations in genes associated with hereditary pheochromocytoma/paraganglioma syndromes (SDHA, SDHB, SDHC, KIF1B, EGLN1, FH, SDHAF2, MAX, SDHD, RET exon 10,11, VHL, TMEM127). The gene discussed is TMEM127; the disease is hereditary pheochromocytoma-paraganglioma.