In accordance with the results of studies by Erlic et al. (2010) and Pęczkowska et al. (2013) showing occasional phaeochromocytoma cases with co-occurrence of the RET Y791F variant and pathogenic variants in other phaeochromocytoma-related genes, we identified a 68-year-old male with phaeochromocytoma carrying the RET Y791F variant and the new germline variant D236N in the SDHB gene. The gene discussed is RET; the disease is pheochromocytoma.