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|
Prominent back of the skull
Prominent posterior skull[ more ]
|30%-79% of people have these symptoms|
|5%-29% of people have these symptoms|
|Aplasia/Hypoplasia of the
|Tetralogy of Fallot||0001636|
|Percent of people who have these symptoms is not available through HPO|
|Agenesis of cerebellar vermis||0002335|
|Cranial nerve paralysis||0006824|
|Dilated fourth ventricle||0002198|
|Elevated imprint of the transverse sinuses||0000930|
|Partial absence of cerebellar vermis||0002951|
|Posterior fossa cyst at the fourth ventricle||0000933|
|Thinning and bulging of the posterior fossa bones||0000931|
Research helps us better understand diseases and can lead to advances in diagnosis and treatment. This section provides resources to help you learn about medical research and ways to get involved.
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.
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.
Got a Great Research Idea? ‘All of Us’ Wants to Hear It!
January 18, 2018
New NCATS Rare Diseases Research Video
December 27, 2017
Rare Disease Day at NIH on March 1, 2018
December 19, 2017
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. Submit a new question
My wife is 17 weeks pregnant. During a level 2 ultrasound scan, the doctor told us there is a problem with the development of the cerebellar vermis. Can the vermis develop after 17 weeks? If a child is born with this, what problems could the child face? What are other tests we can do to confirm the condition? See answer
Can a child have Dandy-Walker variant and have other extracranial malformations, such as kidney and foot issues? Or does the presence of other issues point toward the more serious Dandy-Walker malformation? See answer
My husband was diagnosed with Dandy Walker variant at the age of 50. His brain surgeon placed a shunt. We have three children of adult age. Should they be concerned that this can be passed on? He went his whole life not knowing he had Dandy Walker till problems neurologically started happening and was in critical condition. How long can a person live with this once shunted and can our children be concerned that this is passed on? See answer
What is the life expectancy of someone with Dandy-Walker complex? See answer