Okamoto syndrome

[MIM 604 916]

Prevalence < 1/106.


Association of:

-        congenital hydronephrosis,.

-        severe intellectual deficit and growth retardation

-        cleft palate.

-        hypotonia

-        a characteristic facial dysmorphism: midface hypoplasia, prominent eyes with epicanthus, long eyelashes, long philtrum, short and upturned nose with anteversed nostrils, low set ears



-        webbed neck


Cardiac anomalies have been described: ASD, VSD, ductus arteriosus, aortic valve anomalies. One case of tethered cord.


Anesthetic implications:

echocardiography; risk of difficult mask ventilation and/or intubation


References :

-        Markouri M, Karpathios T, Dinopoulos A, Attilakos A et al.
Okamoto syndrome in a girl of Caucasian origin.
Developmental Medicine & Child Neurology 2008 ; 50 : 250-2

-        Wallerstein R., Rhoads F.
Natural history of a child with Okamoto syndrome.
Clinical Dysmorphology 2013 ; 22 :127-8


Updated: July 2019