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Syndrome reference sheet
Generated 13 Oct 2026
Endocrinology · Endocrinology / Bone and mineral disorders

Mazabraud syndrome

Also known as: Fibrous dysplasia with intramuscular myxomas

Fibrous dysplasia associated with intramuscular myxomas.

Medical specialty
Endocrinology
Subspecialty
Endocrinology / Bone and mineral disorders
Sex & age distribution
Male: affected; Female: affected; Children: rare
Gene(s) involved
GNAS

Etiology & mechanism

Somatic GNAS activating variants.

Gene(s) involved (1)

GNAS

Symptoms & signs (4)

bone painfracturesleg length discrepancysoft tissue mass
SyndromeScope — educational reference. Content is model-generated and not clinically verified; always confirm against OMIM, Orphanet and GeneReviews before clinical use.