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megalencephaly

megalencephaly Megalencephaly is a congenital abnormality in which the occipitofrontal head circumference is more than two standard deviations above the average for the person’s age.

Megalencephaly is a congenital abnormality in which the occipitofrontal head circumference is more than two standard deviations above the average for the person’s age. It can occur with hydrocephalus, subdural effusion, arachnoid cysts, or as part of a genetic condition.

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Sources

Drafting source: U.S. National Library of Medicine. Medical Subject Headings (MeSH), 2026 descriptor edition. “Megalencephaly” (D058627).
public-domain-US-government · Definition uses new wording; original source retains its stated licence. · Source snapshot SHA-256: f4339837e5ce728d59229737271179cfc45f7c4c2318205c617937116f54440b

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PsychTerms (psychterms.org), CC BY 4.0, version 1. “megalencephaly.” Development preview.

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