National Center for Advancing and Translational Sciences Genetic and Rare Diseases Information Center, a program of the National Center for Advancing and Translational Sciences

Developmental dysphasia familial



Other Names:
Developmental language disorder; Specific language impairment
Categories:

Developmental dysphasia is a language disorder that develops in children. The disorder typically involves difficulties speaking and understanding spoken words. The symptoms cannot be attributed to sensorimotor, intellectual deficits, autism spectrum, or other developmental impairments. Likewise it does not occur as the consequence of an evident brain lesion or as a result of the child's social environment. Familial cases of developmental dyphasia have been described. In these families, the condition is inherited in an autosomal dominant fashion.[1]
Last updated: 8/27/2013

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.

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Medical Terms Other Names
Learn More:
HPO ID
80%-99% of people have these symptoms
Dysphasia 0002357
Expressive language delay 0002474
Incomprehensible speech 0002546
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Last updated: 7/1/2020

The severity of the signs and symptoms experienced by children with developmental dysphasia can vary significantly. In some instances, language difficulties persist through adolescence. In addition, children with developmental dysphasia often have difficulty learning to read.[1]
Last updated: 8/27/2013

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.

Organizations Supporting this 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.

In-Depth Information

  • The Monarch Initiative brings together data about this condition from humans and other species to help physicians and biomedical researchers. Monarch’s tools are designed to make it easier to compare the signs and symptoms (phenotypes) of different diseases and discover common features. This initiative is a collaboration between several academic institutions across the world and is funded by the National Institutes of Health. Visit the website to explore the biology of this condition.
  • Online Mendelian Inheritance in Man (OMIM) is a catalog of human genes and genetic disorders. Each entry has a summary of related medical articles. It is meant for health care professionals and researchers. OMIM is maintained by Johns Hopkins University School of Medicine. 
  • Orphanet is a European reference portal for information on rare diseases and orphan drugs. Access to this database is free of charge.
  • PubMed is a searchable database of medical literature and lists journal articles that discuss Developmental dysphasia familial. Click on the link to view a sample search on this topic.

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 son has been diagnosed with developmental dysphasia.  I want to know more, the prognosis of his speech, the link between this and epilepsy which he also has, anything someone might be able to tell me other than his team of docs.  Thank you! Oh, and the prevalence of this disorder! See answer



  1. de Guibert C, Maumet C, Jannin P, Ferré JC, Tréguier C, Barillot C, Le Rumeur E, Allaire C, Biraben A. Abnormal functional lateralization and activity of language brain areas in typical specific language impairment (developmental dysphasia). Brain. 2011 Oct;134(Pt 10):3044-58; http://www.ncbi.nlm.nih.gov/pubmed/21719430. Accessed 8/27/2013.