Klippel-Feil syndrome

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Klippel-Feil syndrome is a rare disorder, initially reported in 1912 by Maurice Klippel and Andre Feil from France,[1] characterized by the congenital fusion of any 2 of the 7 cervical vertebrae.

[2] Autosomal dominant inheritance is especially associated with C2-C3 fusion. Autosomal recessive inheritance is especially associated with C5-C6 fusion

It is caused by a failure in the normal segmentation or division of the cervical vertebrae during the early weeks of fetal development.

The most common signs of the disorder are a short neck, low hairline at the back of the head, and restricted mobility of the upper spine.

Associated abnormalities may include:

The disorder also may be associated with abnormalities of:

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