Karyotyping

Injury	Disease	Nutrition	Poison

Symptoms	Surgery	Test	Special Topic

Karyotyping

Overview

Risks

Results

Karyotyping

Alternative Names:

Chromosome analysis

Normal Values:

Females: 44 autosomes and 2 sex chromosomes (XX), denoted 46 (X,X)
Males: 44 autosomes and 2 sex chromosomes (XY), denoted 46 (X,Y)

What abnormal results mean:

Abnormal results may show Down syndrome (Trisomy 21 = three copies of chromosome 21 instead of the normal two copies), Trisomy 18, Philadelphia chromosome, Klinefelter syndrome, Turner syndrome, or other abnormalities.

Additional conditions under which the test may be performed:

Chronic myelogenous leukemia (CML) or other leukemias
Multiple birth defects
A baby born with genitals that are neither completely male or female

Review Date: 4/20/2005
Reviewed By: Neal Sondheimer, M.D., PhD., Division of Genetics and Metabolism, Children's Hospital of Philadelphia, Philadelphia, PA. Review provided by VeriMed Healthcare Network.

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