Overview
What is arthrogryposis multiplex congenita (AMC)?
What is the role of fetal akinesia in the etiology of arthrogryposis multiplex congenita (AMC)?
What is the pathophysiology of arthrogryposis multiplex congenita (AMC)?
What is the prevalence of arthrogryposis multiplex congenita (AMC) in the US?
What is the global prevalence of arthrogryposis multiplex congenita (AMC)?
What is the mortality and morbidity associated with arthrogryposis multiplex congenita (AMC)?
What are the racial predilections of arthrogryposis multiplex congenita (AMC)?
What are the sexual predilections of arthrogryposis multiplex congenita (AMC)?
How is arthrogryposis multiplex congenita (AMC) diagnosed?
Presentation
Which family history findings are characteristic of arthrogryposis multiplex congenita (AMC)?
Which pregnancy history findings are characteristic of arthrogryposis multiplex congenita (AMC)?
Which delivery history findings are characteristic of arthrogryposis multiplex congenita (AMC)?
Which physical findings are characteristic of arthrogryposis multiplex congenita (AMC)?
How are contractures characterized in arthrogryposis multiplex congenita (AMC)?
Which physical deformities are characteristic of arthrogryposis multiplex congenita (AMC)?
Which craniofacial findings are characteristic of arthrogryposis multiplex congenita (AMC)?
Which respiratory findings are characteristic of arthrogryposis multiplex congenita (AMC)?
Which limb malformation are characteristic of arthrogryposis multiplex congenita (AMC)?
Which skin findings are characteristic of arthrogryposis multiplex congenita (AMC)?
Which cardiac findings are characteristic of arthrogryposis multiplex congenita (AMC)?
Which neurological findings are characteristic of arthrogryposis multiplex congenita (AMC)?
Which muscular findings are characteristic of arthrogryposis multiplex congenita (AMC)?
What causes arthrogryposis multiplex congenita (AMC)?
DDX
What is amyoplasia (classic arthrogryposis)?
What are distal arthrogryposes?
How is bony fusion differentiated from arthrogryposis multiplex congenita (AMC)?
How is multiple pterygium syndrome differentiated from arthrogryposis multiplex congenita (AMC)?
How is popliteal pterygium syndrome differentiated from arthrogryposis multiplex congenita (AMC)?
How is Freeman-Sheldon syndrome differentiated from arthrogryposis multiplex congenita (AMC)?
How is osteochondrodysplasias differentiated from arthrogryposis multiplex congenita (AMC)?
Workup
What is the role of lab tests in the workup of arthrogryposis multiplex congenita (AMC)?
What is the role of imaging studies in the workup of arthrogryposis multiplex congenita (AMC)?
What is the role of EMG and NCS in the workup of arthrogryposis multiplex congenita (AMC)?
What is the role of biopsy in the workup of arthrogryposis multiplex congenita (AMC)?
Treatment
How is arthrogryposis multiplex congenita (AMC) treated?
What is the role of surgery in the treatment of arthrogryposis multiplex congenita (AMC)?
Which dietary modifications are used in the treatment of arthrogryposis multiplex congenita (AMC)?
Which activity modifications are used in the treatment of arthrogryposis multiplex congenita (AMC)?
Medications
What is the role of medications in the treatment of arthrogryposis multiplex congenita (AMC)?
Follow-up
When is long-term monitoring indicated in the treatment of arthrogryposis multiplex congenita (AMC)?
When is inpatient care indicated in the treatment of arthrogryposis multiplex congenita (AMC)?
What are the possible complications of arthrogryposis multiplex congenita (AMC)?
What is the prognosis of arthrogryposis multiplex congenita (AMC)?
Where are patient education resources found for arthrogryposis multiplex congenita (AMC)?
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An infant with amyoplasia. Note internally rotated and adducted shoulders, fixed extended elbows, pronated forearms, flexed wrists and fingers, and severe talipes deformity.
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An infant with distal arthrogryposis type I. Note medially overlapping fingers, tightly clenched fists, and positional foot contractures.
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The hands of a patient with contractural arachnodactyly (Beals syndrome). Note the long, thin fingers with interphalangeal joint contractures.
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A girl with an autosomal recessive type of multiple pterygium syndrome. Note the multiple joint contractures at the knees with marked pterygia, including intercrural webbing, affecting her stance and ambulation.
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A mother and child both affected with trismus pseudocamptodactyly. Note the small mouth (with limited ability to open) and flexion contractures of fingers on dorsiflexion.
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Twins with a lethal type of autosomal recessive multiple pterygium syndrome. Note the multiple joint contractures with marked pterygia, cardiac and lung hypoplasia, and characteristic facies.
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An infant with a lethal type of multiple pterygium syndrome. Note multiple joint contractures with marked pterygia and a cystic hygroma on the posterior aspect of the head and the neck.
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The photograph on the left shows an infant with fetal akinesia. Note depressed nasal bridge, micrognathia, flexion contractures of elbows, bilateral clubhands, and arthrogryposis of fingers. The radiograph on the right shows an infant with fetal akinesia. Note gracile ribs; thin, long bones with multiple fractures at mid diaphyses of the humeri, distal diaphyses of the femora, and proximal diaphyses of both tibiae and left fibula; and clubhands.
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An infant with Pena-Shokeir syndrome. Note characteristic facies (ocular hypertelorism; short nose with depressed bridge; small and markedly recessed jaw; low-set, malformed ears), short neck, mild contracture at the hip, moderate contractures at elbows and knees, severe ankle contractures, and camptodactyly with ulnar deviation of the hands.