disease has basis in dysfunction of SOS2 Noonan syndrome 9 Any Noonan syndrome in which the cause of the disease is a mutation in the SOS2 gene. DOID:0060587 MONDO:0014691 NS9 Noonan syndrome 9 Noonan syndrome caused by mutation in SOS2 Noonan syndrome type 9 OMIM:616559 SOS2 Noonan syndrome UMLS:C4225282 Noonan syndrome