Furthermore, among the conditions related to mutations in the SDHx genes, the Carney diad (or Carney-Stratakis diad) syndrome is associated with mutations in the SDHB, SDHC, and SDHD genes [92] and manifests as paragangliomas and gastrointestinal stromal tumors in patients of either sex. This evidence concerns the gene SDHC and paraganglioma.