Trisomy 9

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Trisomy 9
Chromosome 9.svg
Chromosome 9
ICD-10 Q92
ICD-9 758
DiseasesDB 32657
MeSH D014314

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Synonyms and Keywords:

Overview

Trisomy 9 is a chromosomal disorder caused by having three copies (trisomy) of chromosome number 9. It can appear with or without mosaicism.

Symptoms

Symptoms vary, but usually result in dysmorphisms in the skull, nervous system, and mental retardation. Dysmorphisms in the heart, kidneys, and musculoskeletal system may also occur.

Diagnosis

Laboratory Findings

Trisomy 9 can be detected prenatally with chorionic villus sampling and cordocentesis, and can be suggested by obstetric ultrasonography.

Because trisomy 9 may appear with mosaicism, it is suggested that doctors take samples from multiple tissues when karyotyping for diagnosis.[1]

References

  1. Stipoljev F, Kos M, Kos M, Miskovi B, Matijevic R, Hafner T, Kurjak A (2003). "Antenatal detection of mosaic trisomy 9 by ultrasound: a case report and literature review". J Matern Fetal Neonatal Med. 14 (1): 65–9. PMID 14563095.

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