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Specialty. Medical genetics. In humans, a single transverse palmar crease is a single crease that extends across the palm of the hand, formed by the fusion of the two palmar creases. Although it is found more frequently in persons with several abnormal medical conditions, it is not predictive of any of these conditions since it is also found in ...
Palmar crease. A single transverse palmar crease, one type of palmar crease. A palmar crease is a type of crease on the palm. A single transverse palmar crease also called simian crease is sometimes associated with Down syndrome. [1] Other types of creases include the Sydney crease and the Suwon, or double transverse palmar crease.
Trisomy 21. Down syndrome (also known by the karyotype 47,XX,+21 for females and 47,XY,+21 for males) [98] is mostly caused by a failure of the 21st chromosome to separate during egg or sperm development, known as nondisjunction. [91] As a result, a sperm or egg cell is produced with an extra copy of chromosome 21; this cell thus has 24 ...
“The person could have some physical features of Down syndrome, such as the single crease often seen in the palm of a child with Down syndrome, or even health issues such as heart defects ...
Down syndrome is a genetic disorder that often results in distinct physical differences and intellectual disability. According to the Centers for Disease Control, each year about 6,000 babies are ...
Genetics of Down syndrome. Down syndrome is a chromosomal abnormality characterized by the presence of an extra copy of genetic material on chromosome 21, either in whole (trisomy 21) or part (such as due to translocations). The effects of the extra copy varies greatly from individual to individual, depending on the extent of the extra copy ...
Frequency. 1 in 20,000 newborns [1] Poland syndrome is a birth defect characterized by an underdeveloped chest muscle and short webbed fingers on one side of the body. [3][1] There may also be short ribs, less fat, and breast and nipple abnormalities on the same side of the body. [1] Typically, the right side is involved. [3]
March 21, 2024 at 7:57 PM. Nick Safier and his little brother Gabe share the best ritual. When Nick, 28, leaves home and returns, his brother Gabe, 21, who has Down syndrome, gives him a big hug ...