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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After birth, consultation with pediatricians, neurologists, and geneticists is essential for a specific diagnosis. There is no known genetic transmission, no known infectious properties, and no known predisposing elements related to the disorder. Families with DA were also studied separately. J Bone Joint Surg.

Arthrogryposis multiplex congenita

Other causes of fetal akinesia may include a maternal fever during pregnancy or a virus. In a nationwide study of arthrogryposis in children and adolescents in Sweden, individuals were investigated [ 43 ].

Congenital deformities of the feet, hips and spine may require surgical correction at or about one year of age. Ongoing controversies regarding etiology, diagnosis, treatment Ongoing research relates to seeking an underlying cause for amyoplasia and future replacement of muscle tissue through stem cell work for the production of more muscle mass as a treatment option.

Intelligence in these patients is normal. Further evidence that arthrogryposis multiplex congenita in the human sometimes is caused by an intrauterine vascular accident. 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.


For more information on these disorders, choose the specific disorder name as your search term in the Rare Disease Database. This neurogenic cause is often accompanied by a wide range of other conditions.

Rare Disease Database

The sarcomere is the functional unit of striated muscle contraction. Congenota information Article notes Copyright and License information Disclaimer. Pediatric review and habilitative aspects.

Search within a coongenita type, and even narrow to one or more resources. The most common form of AMC is Amyoplasia. No relation between malignant hyperthermia and arthrogryposis syndromes has been demonstrated. The most common universal symptom of AMC is limited or absent movement around small and large joints contractures. Such disorders are usually inherited. During pregnancy, ultrasonographic abnormalities and decreased fetal movements can suggest the possibility of a fetus who has some form of arthrogryposis or congenuta contracture.

Motion is essential for the proper development of fetal joints. An evaluation by a clinical geneticist is also invaluable in a number of cases, mainly those with specific malformation syndromes or dysmorphic features. The term arthrogryposis is a descriptive term for congenital contractures, that is, joint contractures that are present at birth.

The diagnosis of arthrogryposis congnita congenita or amyoplasia usually is made at birth. DA syndromes are characterized by mainly distal congenital joint contractures, i. AMC affects approximately 1 in 3, individuals. Clinically, the common morphologic features suggest a genetic syndrome, but occurrence is sporadic and individuals with amyoplasia have unaffected children [ 1 ].

As a group, patients with amyoplasia have more severe muscle weakness and joint contractures than DA patients.

Orphanet: Amyoplasia congenita

DA syndromes may be re-defined according to pathogenic background, as several DA syndromes have been found to be caused by sarcomeric myopathy.


Intelligence may or may not be affected. What laboratory studies should you request to help confirm the diagnosis? Excellent retrospective work on 11 children followed extensively.

Amyoplasia, the most common type of arthrogryposis: This subgroup is characterized by multiple congenital contractures.

Emedicine Journal, March 2, Search within a content type, and even narrow to contenita or more resources. Troponin, tropomyosin, and myosin are sarcomeric proteins important congwnita muscle contraction. Amyo;lasia must be a registered member of Cancer Therapy Advisor to post a comment. Common symptoms include contractures of two or more areas of the body, less involvement of the proximal joints those cognenita closest to the center of the bodyand highly variable expressivity, which means that specific symptoms vary greatly even among individuals with the same disorder and even in the same family.

Pop-up div Successfully Displayed This div only appears when the trigger link is hovered over. If significant, pleural effusions should be drained preoperatively. A correct diagnosis is important. The abnormal development of connective tissue in the joints can restrict fetal movements, potentially causing multiple contractures. In this study, 39 patients had cerebral or spinal involvement, three patients had mechanical restriction in utero, 12 neuromuscular, and nine connective tissue involvement.

This group includes lethal syndromes and syndromes with severe disabilities due to CNS malfunction. An example is an isolated congenital clubfoot.