Legius syndrome

Legius syndrome

also known as Noonan-like syndrome
[prevalence unknown]

Legius syndrome is characterized by multiple café au lait macules without neurofibromas or other tumor manifestations of neurofibromatosis type 1 (NF1). Additional clinical manifestations reported commonly include intertriginous freckling, lipomas, macrocephaly, and learning disabilities / ADHD / developmental delays. Current knowledge of the natural history of Legius syndrome is based on the clinical manifestations of fewer than 200 individuals with a molecularly confirmed diagnosis; better delineation of the clinical manifestations and natural history of Legius syndrome will likely occur as more affected individuals are identified.

[Stevenson D, Viskochil D, Mao R, Muram-Zborovski M, for GeneReviews for Legius syndrome, 2010]

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