ICD Q93.5ORPHA:48652PMS

Phelan-McDermid Syndrome

Phelan-McDermid syndrome is caused by deletion or mutation of the SHANK3 gene on chromosome 22q13, causing intellectual disability, absent or delayed speech, hypotonia, and autism spectrum features. Diagnosis rates have increased significantly with genetic testing. SHANK3-targeted therapies are under investigation.

393
Articles
15
Trials
Updated
26 March 2026
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Common Questions

What is Phelan-McDermid Syndrome?

Phelan-McDermid syndrome is caused by deletion or mutation of the SHANK3 gene on chromosome 22q13, causing intellectual disability, absent or delayed speech, hypotonia, and autism spectrum features. Diagnosis rates have increased significantly with genetic testing. SHANK3-targeted therapies are under investigation.

How many clinical trials are available for Phelan-McDermid Syndrome?

RareWays currently indexes 15 clinical trials for Phelan-McDermid Syndrome, of which 3 are actively recruiting. Trial availability changes as new studies are registered — check the trials tab for current status.

Where does the research data for Phelan-McDermid Syndrome come from?

RareWays aggregates research from PubMed, Europe PMC, OpenAlex, and ClinicalTrials.gov. Data is updated regularly by Rocky, RareWays' automated research engine. All articles and trials link directly to their original sources.

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This information is for general awareness only.

For guidance specific to your situation, please speak with your healthcare team.