Arthrogryposis multiplex congenita (AMC) is a group of disorders characterized by congenital limb contractures. It manifests as limitation of movement of multiple . Amyoplasia is a condition characterized by a generalized lack in the newborn of muscular It is the most common form of arthrogryposis multiplex congenita ( AMC), where multiple joint contractures are present at birth. Arthrogryposis is. “Amyoplasia Congenita.” Syndromes: Rapid Recognition and Perioperative Implications Bissonnette B, Luginbuehl I, Marciniak B, Dalens BJ. Bissonnette B.

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Therefore, it is important to make a specific diagnosis in each child if possible.

Amyoplasia – Wikipedia

A revised and extended classification was made by Bamshad et al. Powered By Decision Support in Medicine. Families with DA were also studied separately. When joint contractures affect two or more extremities, the term arthrogryposis is frequently used to describe the findings; however, this clinical finding is characteristic of multiple disorders.

Amyoplasia congenita | Radiology Reference Article |

Less often, AMC may be associated with certain muscle disorders including the muscular dystrophies, certain mitochondrial disorders and a variety of genetic muscle disorders that are present at birth congenital myopathies. To be sure that one congebita the correct diagnosis of arthrogryposis multiplex congenita, considering the wide number of abnormalities that may be associated with joint contractures, after birth it is important to have an evaluation by a pediatric neurologist and a geneticist.

A defective function of contractile muscle proteins during fetal life influencing fetal mobility seems to be the common cause of congenital joint contractures in these syndromes [ 1819 ].


Excellent retrospective work on 11 children followed extensively. There have been no reports of recurrent cases of amyoplasia in a family. Am J Med Genet ; Please review our privacy policy.

The common pathogenesis is impaired fetal movements. Subdivisions of Arthrogryposis Multiplex Congenita Amyoplasia distal arthrogryposis ptergium syndrome. DA2A, Freeman—Sheldon syndrome, is characterized by a small mouth, facial contractures, scoliosis, mainly distal joint contractures, and short stature [ 39 ].

This group includes lethal syndromes and syndromes with severe disabilities due to CNS malfunction. An example is an isolated congenital clubfoot. Common deformities of the lower extremities include.

Metabolic disease such as phosphofructokinase deficiency can cause arthrogryposis, and drugs taken during pregnancy can also be associated with arthrogryposis e.

AMC: amyoplasia and distal arthrogryposis

Alone we are rare. If so, which ones? For example, stretching should be minimized in diastrophic dysplasia, where too intensive mobilization may damage joint cartilage. Pop-up div Successfully Displayed This div only appears when the trigger link is hovered over.

Arthrogryposis multiplex congenita with maternal autoantibodies specific for a fetal antigen. Passive mobilization of joints is the early treatment Removable splints combined with vigorous therapy are the most effective conservative treatment However, surgical release of the affected joints is often necessary Clubfoot associated with arthrogryposis is very stiff and nearly always requires surgical correction Knee surgery, including capsulotomy, osteotomy, and tendon lengthening, is used to correct deformities.

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Overall prognosis for children with amyoplasia is good. The Merck Manual-Home Edition.

Compromised fetal mobility is the main background factor, common to all different types of arthrogryposis. It is characterized by the four limbs being involved, and by the replacement of skeletal muscle by dense fibrous and adipose tissue.


By registering you consent to the collection and use of your information to provide the products and services you have requested from us and as described in our privacy policy and terms and conditions. Investigation of the spinal cord in infants with neurogenic arthrogryposis has demonstrated abnormal histology and unequal distribution of alpha motor neurons in anterior horn cells, the latter being also predictive of involved muscle groups [ 7 ].

The most common form of arthrogryposis is amyoplasia, which accounts for approximately one-third of all congenuta [ 1 ]. Arthrogryposis multiplex congenita amyoplasia: However, hyperpyrexia and hypermetabolism have been described in association with volatile anesthetics, although these reactions were thought to be distinct from malignant hyperthermia. All had onset during fetal development.

It is thought to be multifactorial, meaning that numerous genes and environmental factors play a role in its development. For many types, the cause congneita not fully understood.

Involvement of only the upper limbs was seen in four, only the lower limbs in six, and both the upper amyopplasia lower limbs in 25 patients. Distal arthrogryposis DA syndromes are characterized by mainly distal congenital joint contractures, i. The muscles of the affected limbs may be underdeveloped hypoplasticresulting in a tube-shaped limb with a soft, doughy feeling.