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The extra digit in these breeds presents as an extra "thumb" that does not touch the ground. [76] Mixed-breed chickens may also have extra digits if the aforementioned breeds are part of their genetic makeup. [citation needed] Polydactyly also occurs in dogs, cats, and small mammals such as guinea pigs [78] and mice. [79]
Phocomelia is a congenital condition that involves malformations of human arms and legs which result in a flipper-like appendage. [1] [2] A prominent cause of phocomelia is the mother being prescribed the use of the drug thalidomide during pregnancy; however, the causes of most cases are to be determined.
Triphalangeal thumb (TPT) is a congenital malformation where the thumb has three phalanges instead of two. The extra phalangeal bone can vary in size from that of a small pebble to a size comparable to the phalanges in non-thumb digits. The true incidence of the condition is unknown, but is estimated at 1:25,000 live births. [1]
Familial opposable triphalangeal thumb duplication is a limb malformation syndrome and a type of pre-axial polydactyly, characterized by having duplicated opposable triphalangeal thumbs. This condition can be a symptom of other genetic disorders, such as Holt–Oram syndrome and Fanconi anemia .
Approximately one third of individuals born with Carpenter syndrome have a type of heart defect. Commonly seen heart defects may include: narrowing of the pulmonary artery, transposition of the major blood vessels, or the presence of an abnormally large vena cava, which delivers blood back to the heart from the head, neck, and upper limbs.
Surgical treatment should be considered in patients who have not been treated at younger age or when conservative therapy fails. Surgery is recommended during the age of three to five years. [citation needed] Techniques. Release the thumb web space: it is possible to widen and deepen the area between the thumb and the index finger when it is ...
A 7-month-old baby born in New Jersey is being considered the first to ever survive his rare condition past birth. The child, named Lucas, was diagnosed with exencephaly, a rare condition in which ...
Congenital insensitivity to pain (CIP), also known as congenital analgesia, is one or more extraordinarily rare conditions in which a person cannot feel (and has never felt) physical pain. [1] The conditions described here are separate from the HSAN group of disorders, which have more specific signs and cause.