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In rare cases, congenital defect results in a short tail-like structure being present at birth. Twenty-three cases of human babies born with such a structure have been reported in the medical literature since 1884. [22] [23] In these cases, the spine and skull were determined to be entirely normal. The only abnormality was that of a tail ...
Tetrapod legs evolved in the Devonian or Carboniferous geological period from the pectoral fins and pelvic fins of their crossopterygian fish ancestors. Fish fins develop along a "fin line", which runs from the back of the head along the midline of the back, round the end of the tail, and forwards along the underside of the tail, and at the cloaca splits into left and right fin lines which run ...
Survival to adulthood does however occasionally occur in cases where the twins are born with three to four arms. [6] Chances of survival are improved if two complete hearts are present. [ 7 ] Separation surgery is contraindicated, except in cases where one of the twins is clearly dying.
On December 10, 2003, Rebeca Martínez was born in the Dominican Republic. She was the first baby born with the condition to undergo an operation to remove the second head. She died on February 7, 2004, after an 11-hour operation. [8] On March 30, 2004, Manar Maged was born.
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.
A fetus or foetus (/ ˈ f iː t ə s /; pl.: fetuses, foetuses, rarely feti or foeti) is the unborn mammalian offspring that develops from an embryo. [1] Following the embryonic stage, the fetal stage of development takes place.
The patella (pl.: patellae or patellas), also known as the kneecap, is a flat, rounded triangular bone which articulates with the femur (thigh bone) and covers and protects the anterior articular surface of the knee joint.
[3] [4] Other causes are presumably involved, as demonstrated by the rare overall incidence of caudal regression syndrome (1:60,000) compared to diabetes; however, the condition does have a greatly increased incidence among infants born to mothers with diabetes, estimated at 1 in 350 newborns of mothers with diabetes. [2]