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McCune–Albright syndrome is a complex genetic disorder affecting the bone, skin and endocrine systems. It is a mosaic disease arising from somatic activating mutations in GNAS , which encodes the alpha-subunit of the G s heterotrimeric G protein .
The disorder bears the name of Fuller Albright, who characterized it in 1942. [12] He was also responsible for naming it "Sebright bantam syndrome," after the Sebright bantam chicken, which demonstrates an analogous hormone insensitivity. Much less commonly, the term Martin-Albright syndrome is used, this refers to Eric Martin. [13]
Managing endocrinopathies is a critical component of management in FD. All patients with fibrous dysplasia should be evaluated and treated for endocrine diseases associated with McCune–Albright syndrome. In particular untreated growth hormone excess may worsen craniofacial fibrous dysplasia and increase the risk of blindness. [23]
Multiple Endocrine Neoplasia type 1 (MEN1) is a rare hereditary endocrine cancer syndrome characterized primarily by tumors of the parathyroid glands (95% of cases), endocrine gastroenteropancreatic (GEP) tract (30–80% of cases), and anterior pituitary (15–90% of cases). [19]
Legius syndrome (LS) is an autosomal dominant condition characterized by cafe au lait spots. [3] It was first described in 2007 and is often mistaken for neurofibromatosis type I . It is caused by mutations in the SPRED1 gene.
McCune–Albright syndrome, a rare genetic endocrine disease affecting the bones and pigmentation of the skin, was described independently by both McCune and Dr. Fuller Albright in 1937. McCune wrote more than thirty articles for medical publications and contributed to the Childcraft encyclopedia (1946 and 1954) and Encyclopedia Americana (1955).
Moreover, he also worked on identifying a gain-of-function mutation in the GNAS gene as the basis for constitutive activation of adenylyl cyclase in the McCune-Albright syndrome and confirmed that the unusual distribution of the endocrine, cutaneous, and skeletal lesions in the syndrome is the result of a postzygotic mosaicism. [9]
McCune–Albright syndrome includes polyostotic fibrous dysplasia as part of its presentation. [4] When polyostotic fibrous dysplasia manifests in the long bones, limping results; when it manifests in the face, asymmetric growth of the face can result. [3] One treatment that has been used is bisphosphonates. [5]