What is the prevalence of McCune-Albright syndrome (MAS)?

Updated: Jan 05, 2021
  • Author: Gabriel I Uwaifo, MD; Chief Editor: George T Griffing, MD  more...
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The exact incidence of McCune-Albright syndrome (MAS) in the United States and internationally is unknown, but its prevalence is probably between 1 case in 100,000 population and 1 case in 1 million population, rendering it a very rare, sporadically occurring disorder. [8] In a review of radiographs from 82,000 patients, only 23 cases of PFD were found. Polyostotic variants of FD are uncommon, and MAS is even less common. The relative incidence of monostotic FD (MFD) is 70%, whereas that of PFD is 30% and that of MAS is less than 3%.

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