What are features 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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McCune-Albright syndrome (MAS) consists of at least two of the following three features: (1) polyostotic fibrous dysplasia (PFD), (2) café-au-lait skin pigmentation (see the image below), and (3) autonomous endocrine hyperfunction (eg, gonadotropin-independent precocious puberty). Other endocrine syndromes may be present, including hyperthyroidism, acromegaly, and Cushing syndrome. Mazabraud syndrome, which can also exist in association with MAS, involves the occurrence of myxomas and usually PFD. [1, 2, 3, 4]

McCune-Albright syndrome case showing café-au-lait McCune-Albright syndrome case showing café-au-lait pigmentation. Lesion does not cross midline, which is typical of pigmented lesions in this syndrome.

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