In addition to HPGL/PCC, a multitude of neuroendocrine and non-neuroendocrine neoplasms, such as gastrointestinal stromal tumors (GISTs), renal tumors, and thyroid tumors, have been discovered to exhibit a significant correlation with SDH gene mutations, alongside HPGL/PCC. Here, SDHB is linked to adrenal gland pheochromocytoma.