Trisomy 9
Trisomy 9 is a chromosomal abnormality that is characterized by the presence of an extra (third) copy of chromosome 9 in the cells of the body. This condition can occur in a variety of forms, each with its own set of symptoms and complications.
Types of Trisomy 9[edit | edit source]
There are three main types of Trisomy 9: Full Trisomy 9, Trisomy 9 Mosaicism, and Trisomy 9p.
Full Trisomy 9[edit | edit source]
Full Trisomy 9 is the rarest form of the condition and is typically associated with severe congenital anomalies. Most individuals with Full Trisomy 9 do not survive past infancy.
Trisomy 9 Mosaicism[edit | edit source]
Trisomy 9 Mosaicism occurs when some cells in the body have three copies of chromosome 9, while others have the typical two. The symptoms and severity of Trisomy 9 Mosaicism can vary widely depending on the number and location of cells with the extra chromosome.
Trisomy 9p[edit | edit source]
Trisomy 9p is characterized by an extra copy of the short arm of chromosome 9. This form of Trisomy 9 is associated with a variety of physical abnormalities and developmental delays.
Symptoms and Complications[edit | edit source]
The symptoms and complications of Trisomy 9 can vary widely depending on the type of Trisomy 9 and the number and location of cells with the extra chromosome. Common symptoms and complications can include growth retardation, microcephaly, heart defects, kidney abnormalities, and developmental delay.
Diagnosis[edit | edit source]
Trisomy 9 can be diagnosed through a variety of genetic testing methods, including karyotyping, fluorescence in situ hybridization (FISH), and chromosomal microarray analysis (CMA).
Treatment[edit | edit source]
There is currently no cure for Trisomy 9. Treatment is typically supportive and focuses on managing the symptoms and complications of the condition.
See Also[edit | edit source]
Trisomy 9 Resources | |
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Contributors: Prab R. Tumpati, MD