This table lists symptoms that people with this disease may have. For most diseases, symptoms will vary from person to person. People with the same disease may not have all the symptoms listed. This information comes from a database called the Human Phenotype Ontology (HPO) . The HPO collects information on symptoms that have been described in medical resources. The HPO is updated regularly. Use the HPO ID to access more in-depth information about a symptom.
|Medical Terms||Other Names||
|80%-99% of people have these symptoms|
|Aplasia/Hypoplasia of the corpus callosum||0007370|
Short fingers or toes
Birth defect that causes a hole in the innermost layer at the back of the eye
|Global developmental delay||0001263|
Widely spaced eyes[ more ]
Mental retardation, nonspecific
Mental-retardation[ more ]
Stubby toes[ more ]
|30%-79% of people have these symptoms|
Bulge in wall of large artery that carries blood away from heart
|Coarse facial features||
Coarse facial appearance
|Convex nasal ridge||
Polly beak nasal deformity[ more ]
Long, narrow head
Tall and narrow skull[ more ]
Outward bowing at knees[ more ]
Elongation of face
Increased height of face
Increased length of face
Vertical elongation of face
Vertical enlargement of face
Vertical overgrowth of face[ more ]
Low set ears
Lowset ears[ more ]
Increased size of skull
Large head circumference[ more ]
Little lower jaw
Small lower jaw[ more ]
Flat foot[ more ]
|5%-29% of people have these symptoms|
|Abnormal palate morphology||
Abnormality of the palate
Abnormality of the roof of the mouth[ more ]
|Clinodactyly of the 5th finger||
Permanent curving of the pinkie finger
Asymmetry of face
Unsymmetrical face[ more ]
Joints move beyond expected range of motion
Abnormally small eyeball
Corners of eye widely separated
|Thick lower lip vermilion||
Increased volume of lower lip
Plump lower lip
Prominent lower lip[ more ]
|Percent of people who have these symptoms is not available through HPO|
|Agenesis of corpus callosum||0001274|
Overcrowding of teeth[ more ]
|Downslanted palpebral fissures||
Downward slanting of the opening between the eyelids
Decreased muscle tone
Low muscle tone[ more ]
|Highly arched eyebrow||
Broad, arched eyebrows
High, rounded eyebrows
Thick, flared eyebrows[ more ]
Dislocation of hip[ more ]
|Hypoplasia of teeth||0000685|
Onset in first year of life
Onset in infancy[ more ]
|Intellectual disability, mild||
Mental retardation, borderline-mild
Mild and nonprogressive mental retardation
Mild mental retardation[ more ]
Dislocated lenses[ more ]
Nearsightedness[ more ]
|Short 2nd toe||
Short second toe
Clubfoot[ more ]
If you need medical advice, you can look for doctors or other healthcare professionals who have experience with this disease. You may find these specialists through advocacy organizations, clinical trials, or articles published in medical journals. You may also want to contact a university or tertiary medical center in your area, because these centers tend to see more complex cases and have the latest technology and treatments.
If you can’t find a specialist in your local area, try contacting national or international specialists. They may be able to refer you to someone they know through conferences or research efforts. Some specialists may be willing to consult with you or your local doctors over the phone or by email if you can't travel to them for care.
You can find more tips in our guide, How to Find a Disease Specialist. We also encourage you to explore the rest of this page to find resources that can help you find specialists.
Related diseases are conditions that have similar signs and symptoms. A health care provider may consider these conditions in the table below when making a diagnosis. Please note that the table may not include all the possible conditions related to this disease.
Conditions with similar signs and symptoms from Orphanet
Differential diagnoses include muscle-eye-brain disease, Peters-plus, Walker-Warburg, Aicardi, Donnai-Barrow, and Baraitser-Winter syndromes (see these terms).
Visit the Orphanet disease page for more information.
Support and advocacy groups can help you connect with other patients and families, and they can provide valuable services. Many develop patient-centered information and are the driving force behind research for better treatments and possible cures. They can direct you to research, resources, and services. Many organizations also have experts who serve as medical advisors or provide lists of doctors/clinics. Visit the group’s website or contact them to learn about the services they offer. Inclusion on this list is not an endorsement by GARD.
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.
Questions sent to GARD may be posted here if the information could be helpful to others. We remove all identifying information when posting a question to protect your privacy. If you do not want your question posted, please let us know.