SSTR2 and SSTR3 were found to be expressed in pheochromocytomas and paragangliomas by Leijon et al. [164], with the other three SSTR receptors not being expressed at all; immunohistochemistry of SSTR2A should be taken into consideration for personalized treatment schemes in paragangliomas [165]. The gene discussed is SSTR2; the disease is paraganglioma.