Trisomy

Trisomy 9

Trisomy 9
Classification and external resources

Chromosome 9

ICD-10 Q 92.

ICD-9 758

DiseasesDB 32657

MeSH D014314

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.

Because trisomy 9 may appear with mosaicism, it is suggested that doctors take samples from multiple tissues when karyotyping for diagnosis.^[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. doi:10.1080/713605935. PMID 14563095.

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v • d • e

Trisomies	Down syndrome (21) · Edwards syndrome (18) · Patau syndrome (13) Trisomy 9 · Warkany syndrome 2 (8) · Trisomy 22/Cat eye syndrome (22) · Trisomy 16

Monosomies/deletions	Wolf-Hirschhorn syndrome (4) · Cri du chat (5) · Williams syndrome (7) · Jacobsen syndrome (11) · Miller-Dieker syndrome/Smith-Magenis syndrome (17) · 22q11.2 deletion syndrome (22) genomic imprinting (Angelman syndrome/Prader-Willi syndrome (15))

X/Y linked

Monosomy	Turner syndrome (XO)

Trisomy/ other karyotypes	Klinefelter's syndrome (47,XXY) · 48,XXYY · 49,XXXXY Triple X syndrome (47,XXX) · 48,XXXX · 49,XXXXX 47,XYY

Other