Clinical analysis of Noonan syndrome caused by RRAS2 mutations and literature review.

Abstract excerpt

Noonan syndrome is a common developmental disorder characterized by distinctive facial dysmorphism, short stature, congenital heart defects, pectus deformity, and developmental delay. It is related to the abnormal activation of genes involved in the RAS-MAPK signaling pathway, more than a dozen of which can be affected. However, mutations of the RRAS2 gene are rare, with only 6 different RRAS2 variants in 13...

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