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trisomy 18

trisomy 18 Trisomy 18 is a genetic syndrome caused by an extra full copy of chromosome 18.

Trisomy 18 is a genetic syndrome caused by an extra full copy of chromosome 18. It is marked by severe physical abnormalities, major intellectual impairment, and a life expectancy that usually does not extend beyond infancy.

Also see

Sources

Drafting source: NCI Thesaurus. Flat export snapshot 2026-10-18. “Complete Trisomy 18 Syndrome” (C101362).
CC-BY-4.0 · Definition uses new wording; original source retains its stated licence. · Source snapshot SHA-256: b27ca135beadd46c343d248135377c5077c5447fe11b93803bfab866b84fcd38

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PsychTerms (psychterms.org), CC BY 4.0, version 1. “trisomy 18.” Development preview.

Version 1 · SHA-256: 846dd4def3b5675b7bc7684fa38bd27ea6a1056fb50062c5fa6ca3e6e8778bcd

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