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  2. Polydactyly - Wikipedia

    en.wikipedia.org/wiki/Polydactyly

    This is a rare condition, in which the extra digit is on the ring, middle or index finger. Of these fingers, the index finger is most often affected, whereas the ring finger is rarely affected. [17] This type of polydactyly can be associated with syndactyly, cleft hand, and several other syndromes.

  3. Symbrachydactyly - Wikipedia

    en.wikipedia.org/wiki/Symbrachydactyly

    Symbrachydactyly is a congenital abnormality, characterized by limb anomalies consisting of brachydactyly, cutaneous syndactyly and global hypoplasia of the hand or foot. [1] In many cases, bones will be missing from the fingers and some fingers or toes may be missing altogether.

  4. Arachnodactyly - Wikipedia

    en.wikipedia.org/wiki/Arachnodactyly

    Arachnodactyly ("spider fingers") is a medical condition that is characterized by fingers and toes that are abnormally long and slender, in comparison to the palm of the hand and arch of the foot. In some cases, the thumbs of an individual with the condition are pulled inwards towards the palm.

  5. Birth defect - Wikipedia

    en.wikipedia.org/wiki/Birth_defect

    The number of boys born with 6 fingers is two times higher than the number of girls. [110] Now various techniques are available to detect congenital anomalies in fetus before birth. [111] About 3% of newborns have a "major physical anomaly", meaning a physical anomaly that has cosmetic or functional significance. [112]

  6. Carpenter syndrome - Wikipedia

    en.wikipedia.org/wiki/Carpenter_syndrome

    Other physical abnormalities associated with Carpenter syndrome include extra digits. Extra toes are more commonly seen than fingers. Often both the toes and fingers are webbed, a process that occurs before the sixth week gestational period. Often their digits will be abnormally short, and the fingers are commonly missing an interphalangeal joint.

  7. Clinodactyly - Wikipedia

    en.wikipedia.org/wiki/Clinodactyly

    Clinodactyly is an autosomal dominant trait that has variable expressiveness and incomplete penetrance. [citation needed]Clinodactyly can be passed through inheritance and presents as either an isolated anomaly or a component manifestation of a genetic syndrome. [2]

  8. Syndactyly - Wikipedia

    en.wikipedia.org/wiki/Syndactyly

    In early human fetal development, webbing (syndactyly) of the toes and fingers is normal. At about 6 weeks of gestation, apoptosis takes place due to a protein named sonic hedgehog, also known as SHH, which dissolves the tissue between the fingers and toes, and the webbing disappears. In some fetuses, this process does not occur completely ...

  9. Ectrodactyly - Wikipedia

    en.wikipedia.org/wiki/Ectrodactyly

    The cause of cleft hand lies, for what is known, partly in genetics. The inheritance of cleft hand is autosomal dominant and has a variable penetrance of 70%. [6] Cleft hand can be a spontaneous mutation during pregnancy (de novo mutation). The exact chromosomal defect in isolated cleft hand is not yet defined.