Cytogenetic_Abnormality_Involves_Chromosome CTRP Terminology Human Chromosome 21 CTRP Biomarker Terminology CTRP Molecular Genetic Biomarker Terminology Cellosaurus Disease Terminology ACC/AHA Pediatric and Congenital Cardiology EHR Terminology AML Medical History Table AML Authorized Value Terminology ALL Medical History Table ALL Authorized Value Terminology Personal Medical History Trisomy Trisomy 21 ACC/AHA C3537167 Trisomy 21 Cell or Molecular Dysfunction A chromosomal abnormality consisting of the presence of part or all of a third copy of chromosome 21 in somatic cells. Cellosaurus C43224 Trisomy 21 Trisomy_21 A chromosomal abnormality consisting of the presence of a third copy of chromosome 21 in somatic cells. Trisomy 21 Trisomy-21 CTRP PCDC Preexisting Condition