People with mosaic trisomy 9 can have many different symptoms, including changes to growth and development. Children with mosaic trisomy 9 are often small before birth, which is sometimes called intrauterine growth restriction. At birth, their weight may be low and they may have poor muscle tone (they may seem floppy). These children will most likely remain smaller than their peers. People with mosaic trisomy 9 may also have intellectual disabilities. This means that they may need extra help in school and in other day-to-day needs. They can have specific facial features such as small eyes that slant upward and differently shaped ears. People with mosaic trisomy 9 can also have problems with the vision, heart, muscles, bones, kidneys, and reproduction. Everyone with mosaic trisomy 9 can have a different set of symptoms because they may have a different number of trisomic cells, and these trisomic cells may be more common in different parts of the body.
Speak to a genetic counselor or a medical geneticist to learn more about mosaic trisomy 9.
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