" /> Down syndrome - CISMeF





Preferred Label : Down syndrome;

CISMeF acronym : DCR; DSCR;

Type : Phenotype, molecular basis known;

Alternative titles and symbols : Trisomy 21;

Included titles and symbols : Down syndrome chromosome region; Down syndrome critical region; DCR; DSCR;

Description : Down syndrome, the most frequent form of mental retardation caused by a microscopically demonstrable chromosomal aberration, is characterized by well-defined and distinctive phenotypic features and natural history. It is caused by triplicate state (trisomy) of all or a critical portion of chromosome 21.;

Inheritance : Isolated cases;

Molecular basis : Full trisomy 21, 94%; Mosaic trisomy 21, 2.4%; Translocation 21, 3.3%;

Neoplasia : Leukemia (both ALL and AML); Acute megakaryocytic leukemia;

Prefixed ID : #190685;

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28/04/2025


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