Trisomy 18

MONDO:0018071

Trisomy 18 is a chromosomal abnormality associated with the presence of an extra chromosome 18 and characterized by growth delay, dolichocephaly, a characteristic facies, limb anomalies and visceral malformations.

Also known as: E3 trisomy, Edwards syndrome, chromosome 18 duplication, complete trisomy 18 syndrome, trisomy 18, trisomy type 18, 18 trisomy, chromosome 18 trisomy

5 clinical trials for this condition and its sub-types, 3 tagged with Trisomy 18 itself.

Follow this condition to get notified about new trials

Where it sits in the disease tree

Browse by category →

Part of

↑ Syndromic disease (7158) ↑ Trisomy (24) ↑ Chromosome 18 disorder (4)

Sub-types of Trisomy 18

Complete trisomy 18 0 trials
Mosaic trisomy 18 0 trials

Including sub-types (5) Tagged with Trisomy 18 (3)

Trials to join now! 1 Not yet recruiting 1 Completed 1

Could hidden blood problems be common in children with certain genetic syndromes?

Knowledge-focused Not yet recruiting

This study looks at blood health in children with numerical chromosomal disorders, such as Down syndrome, Turner syndrome, Klinefelter syndrome, Edwards syndrome, and Patau syndrome. Researchers will measure blood counts and check for issues like anemia, low platelets, or abnorma…

Sponsor: Assiut University • Aim: Knowledge-focused

Last updated Sep 12, 2026 00:00 UTC

Trisomy 18

Where it sits in the disease tree

Could hidden blood problems be common in children with certain genetic syndromes?