Severe neonatal manifestations of Costello syndrome.

Abstract excerpt

BACKGROUND: Costello syndrome (CS) is due to mutations in HRAS, with the most common mutation being c.34G>A (p.G12S), found in most patients in all the published series. A small number of less common mutations have been reported. POPULATION STUDIED: HRAS mutation analysis has been undertaken in 74 predominantly British patients with a possible diagnosis of CS. A HRAS mutation was found in 27 patients, 15 of whom...

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