Trisomy 18

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Trisomy 18
TermTrisomy 18
Short definitionTrisomy 18 - (pronounced) (TRY-soh-mee.
TypeCancer terms
SpecialtyOncology
LanguageEnglish
SourceNCI
Comments


Trisomy 18 - (pronounced) (TRY-soh-mee. . . ) A genetic disorder caused by an extra chromosome 18 in some or all of the body's cells. Trisomy 18 is characterized by low birth weight and certain abnormal features. These include a small, unusually shaped head; a small jaw and mouth; clenched fists with overlapping fingers; and heart, lung, kidney, bowel, and stomach defects. Many babies with trisomy 18 die before birth or within the first month of life, but some children live for several years. Having trisomy 18 increases your risk of certain types of cancer, such as hepatoblastoma (a type of liver cancer) and Wilms' tumor (a type of kidney cancer). Also called Edwards syndrome

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