The Human Phenotype Ontology (HPO) provides the following list of features that have been reported in people with this condition. Much of the information in the HPO comes from Orphanet, a European rare disease database. If available, the list includes a rough estimate of how common a feature is (its frequency). Frequencies are based on a specific study and may not be representative of all studies. You can use the MedlinePlus Medical Dictionary for definitions of the terms below.
|Signs and Symptoms||Approximate number of patients (when available)|
|Low-set, posteriorly rotated ears||90%|
|Atresia of the external auditory canal||50%|
|Clinodactyly of the 5th finger||50%|
|Underdeveloped nasal alae||50%|
|Underdeveloped supraorbital ridges||50%|
|Abnormality of the oral cavity||7.5%|
|Aplasia/Hypoplasia of the corpus callosum||7.5%|
|Patent ductus arteriosus||7.5%|
|Abnormal location of ears||-|
|Abnormal shape of the occiput||-|
|Agenesis of corpus callosum||-|
|Arnold-Chiari type I malformation||-|
|Hypoplasia of the corpus callosum||-|
|obsolete Flat midface||-|
|Ventricular septal defect||-|
Living with a genetic or rare disease can impact the daily lives of patients and families. These resources can help families navigate various aspects of living with a rare disease.
These resources provide more information about this condition or associated symptoms. The in-depth resources contain medical and scientific language that may be hard to understand. You may want to review these resources with a medical professional.