Pheochromocytoma and Paraganglioma

Review
In: Endotext [Internet]. South Dartmouth (MA): MDText.com, Inc.; 2000.
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Excerpt

Pheochromocytomas and paragangliomas (PPGLs) are rare neuroendocrine tumors arising from chromaffin cells of the adrenal medulla or neural crest progenitors located outside of the adrenal gland, respectively. These tumors are derived from either sympathetic tissue in the adrenal or extra-adrenal abdominal locations (sympathetic PPGLs) or from parasympathetic tissue in the thorax or head and neck (parasympathetic PPGLs). The clinical presentation is so variable that a PPGL has been described as "the great masquerader". The varied signs and symptoms of PPGLs are attributed to hemodynamic and metabolic actions of the catecholamines produced and secreted by these tumors. For a better understanding of clinical symptomatology of PPGLs, one needs to be aware of the tumor physiology, biochemistry, and molecular biology, which were discussed in detail in this chapter. While most PPGLs are benign, about 10% of pheochromocytomas and 25% of PGL are malignant. The newer targeted therapies for metastatic PPGLs are likely to be based on our understanding of tumor biology and the design of new highly specific compounds with fewer side effects. There has been an extensive research in the field of PPGLs in the last decade that shed light on genetic etiology and multiple possible metabolic pathways that lead to these tumors. In this article, we detail the current literature on diagnosis and management of PPGLs with a special focus on recent advancements in the field. For complete coverage of this and related areas of eendocrinology, please see WWW.ENDOTEXT.ORG.

Publication types

  • Review