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Chromosome 17 trisomy MeSH Supplementary Concept Data 2025
Duplication of chromosome 17 in some tissues (trisomy 17 mosaicism) is among the rarest trisomy in humans and full trisomy 17 has never been observed in living individuals. In mosaic cases, where trisomy occurs only in some cell populations, affected individuals may experience developmental delays, body asymmetry, slow growth, and cerebellar hypoplasia.