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Arthrogryposis

Arthrogryposis (Arthrogryposis Multiplex Congenita) is a muscle disorder that causes multiple joint contractures at birth. A contracture is a limitation in the range of motion of a joint. It is non-progressive. more...

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In some cases, few joints may be affected and the range of motion may be nearly normal. In the "classic" case of arthrogryposis, hands, wrists, elbows, shoulders, hips, feet and knees are affected. In the most severe cases, nearly every body joint may be involved, including the jaw and back. Frequently, the contractures are accompanied by muscle weakness, which further limits movement. Arthrogryposis is relatively rare, occurring in approximately one in 3,000 births. The majority of affected individuals survive but a minority die, usually due to respiratory muscle involvement.

In most cases, arthrogryposis is not a genetic condition and does not occur more than once in a family. In about 30% of the cases, a genetic cause can be identified. The risk of recurrence for these cases varies with the type of genetic disorder.

Research has shown that anything that prevents normal joint movement before birth can result in joint contractures. The joint itself may be normal. However, when a joint is not moved for a period of time, extra connective tissue tends to grow around it, fixing it in position. Lack of joint movement also means that tendons connecting to the joint are not stretched to their normal length; short tendons, in turn, make normal joint movement difficult. (This same kind of problem can develop after birth in joints that are immobilized for long periods of time in casts.)

In general, the causes can be classified into extrinsic and intrinsic factors:

Extrinsic

  • There is insufficient room in the uterus for normal movement. For example, foetal crowding; the mother may lack a normal amount of amniotic fluid or have an abnormally shaped uterus.

Intrinsic

  • Musculoskeletal/Neuromuscular - Muscles do not develop properly (atrophy). In most cases, the specific cause for muscular atrophy cannot be identified. Suspected causes include muscle diseases (for example, congenital muscular dystrophies), maternal fever during pregnancy, and viruses, which may damage cells that transmit nerve impulses to the muscles.
  • Neurological - Central nervous system and spinal cord are malformed. In these cases, a wide range of other conditions usually accompanies arthrogryposis.
  • Connective Tissue - Tendons, bones, joints or joint linings may develop abnormally. For example, tendons may not be connected to the proper place in a joint.

Management

This usually consists of individually tailored orthopaedic correction of deformities.

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Arthrogryposis: A Text Atlas $105.84 Just a Krooked Kid $9.24
Arthrogryposis - A Medical Dictionary, Bibliography, and Annotated Research Guide to Internet References $34.95

Transfer of pectoralis major in arthrogryposis to restore elbow flexion: DETERIORATING RESULTS IN THE LONG TERM
We present the long-term results of pectoralis major transfer to restore elbow flexion in seven patients (ten procedures). The early results in all the ...
Operative treatment of bilateral hip dislocation in children with arthrogryposis multiplex congenita
ABSTRACT Purpose. Arthrogryposis multiplex congenita (AMC) is a rare syndrome with multiple joint contractures. It is commonly believed that bilaterally ...
use of circular fixators for the treatment of joint deformities in arthrogryposis in children, The
Aim: To assess the outcome of operative treatment of joint deformities using circular external fixators in arthrogryposis Materials and Methods: 16 cases ...
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