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MERCK MANUAL
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Chromosome and Gene Abnormalities
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Chromosome and Gene Abnormalities
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Overview of Chromosome and Gene Disorders
Chromosome Abnormalities
Gene Abnormalities
Testing for Chromosome and Gene Abnormalities
Prevention
Down Syndrome (Trisomy 21)
Complications of Down syndrome
Symptoms
Physical development
Cognitive (intellectual) development
Diagnosis
Treatment
Prognosis
More Information
Trisomy 18
Symptoms
Physical abnormalities
Internal abnormalities
Diagnosis
Treatment
Prognosis
More Information
Trisomy 13
Symptoms
Physical abnormalities
Other abnormalities
Diagnosis
Treatment
Prognosis
More Information
Overview of Chromosomal Deletion Syndromes
Cri-du-Chat Syndrome
Symptoms
Diagnosis
Treatment
Prader-Willi Syndrome
Symptoms
Diagnosis
Treatment
Wolf-Hirschhorn Syndrome
Symptoms
Diagnosis
Treatment
Overview of Sex Chromosome Abnormalities
Fragile X Syndrome
Symptoms
Diagnosis
Treatment
More Information
Klinefelter Syndrome
Symptoms
Diagnosis
Treatment
Noonan Syndrome
Symptoms
Diagnosis
Treatment
Trisomy X
Turner Syndrome
Symptoms
Infants
Older children, adolescents, and women
Diagnosis
Treatment
XYY Syndrome