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Arthrogryposis
Classification and external resources
Template:Px
Drawing of an infant with arthrogryposis
ICD-10 Q743
ICD-9 728.3, 754.89
OMIM 108110 108120 208100 301830 601701 208200 108200 301830 208155 601680 108145 208085
DiseasesDB 31688 31816
eMedicine ped/142
MeSH D001176

Arthrogryposis, or arthrogryposis multiplex congenita (AMC), is a rare congenital disorder that is characterized by multiple joint contractures and can include muscle weakness and fibrosis. It is a non-progressive disease.[1][2][3][4][5][6][7][8][9][10] The disease derives its name from Greek, literally meaning "curving of joints" (arthron, "joint"; grȳpōsis, late Latin form of late Greek grūpōsis, "hooking").[11]

There are many known subgroups of AMC, with differing signs, symptoms, causes etc.[3] In some cases, few joints may be affected and may have a nearly full range of motion. In the most common type of arthrogryposis, called amyoplasia, hands, wrists, elbows, shoulders, hips, feet and knees are affected. In the most severe types, nearly every joint is involved, including the jaw and back.

Frequently, the contractures are accompanied by muscle weakness, which further limits movement. AMC is typically symmetrical and involves all four extremities with some variation seen.[1][5]

ClassificationEdit

Some of the different types of AMC include:

  • Arthrogryposis multiplex due to muscular dystrophy.[12][13]
  • Arthrogryposis ectodermal dysplasia other anomalies, also known as Cote Adamopoulos Pantelakis syndrome, Trichooculodermovertebral syndrome, TODV syndrome and Alves syndrome.[14][15]
  • Arthrogryposis epileptic seizures migrational brain disorder.[16]
  • Arthrogryposis IUGR thoracic dystrophy,also known as Van Bervliet syndrome.[17][18]
  • Arthrogryposis like disorder, also known as Kuskokwim disease.[19]
  • Arthrogryposis-like hand anomaly and sensorineural deafness.[20][21]
  • Arthrogryposis multiplex congenita CNS calcification.[22]
  • Arthrogryposis multiplex congenita distal (AMCD),[23] with a large number of synonyms such as Arthrogryposis multiplex congenita, distal, x-linked (AMCX1)[24][25] and Arthrogryposis spinal muscular atrophy[26][27][28]
  • Gordon Syndrome, also known as Distal Arthrogryposis, Type 2A.[29]
  • Arthrogryposis multiplex congenita, distal type 2B, also known as Freeman-Sheldon syndrome variant.[30]
  • Arthrogryposis multiplex congenita neurogenic type (AMCN).[31] This particular type of AMC has been linked to the AMCN gene on locus 5q35.[32][33] Arthrogryposis multiplex congenita pulmonary hypoplasia, also with a large number of synonyms.[34][35]
  • Arthrogryposis multiplex congenita whistling face, also known as Illum syndrome.[36][37][38][39]
  • Arthrogryposis multiplex congenita, distal type 1 (AMCD1).[40]
  • Arthrogryposis ophthalmoplegia retinopathy, also known as Oculomelic amyoplasia.[41][42][43]
  • Arthrogryposis renal dysfunction cholestasis syndrome, also known as ARC Syndrome.[44][45]

Signs and symptomsEdit

There are numerous symptoms for this group of conditions.[4] Some of the more common signs and symptoms are associated with the shoulder (internal rotation), elbow (extension and pronation), wrist (volar and ulnar), hand (fingers in fixed flexion and thumb-in-palm), hip (flexed, abducted and externally rotated, often dislocated), knee (flexion) and foot (clubfoot).[8] Complications may include scoliosis, pulmonary hypoplasia, respiratory problems, growth retardation, midfacial hemangioma, facial and jaw variations, and abdominal hernias. Cognition and language are usually normal.[5]

CausesEdit

The cause is unknown,[7] although several mechanisms have been suggested. This includes hyperthermia of the fetus, prenatal virus, fetal vascular compromise, septum of the uterus, decreased amniotic fluid, muscle and connective tissue developmental abnormalities.[5][6] In general, the causes can be classified into extrinsic and intrinsic factors.

ExtrinsicEdit

  • There is insufficient room in the uterus for normal movement. For example, fetal crowding; the mother may lack a normal amount of amniotic fluid or have abnormally shaped uterine muscles.[3][9]

IntrinsicEdit

  • Neurological - Central nervous system and spinal cord are malformed. In these cases, a wide range of other conditions usually accompanies arthrogryposis.[6]
  • 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.[3][9]

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.)

The principal cause of AMC is believed to be decreased fetal movements (akinesia) caused by maternal or fetal abnormalities. It is associated with neurogenic and myopathic disorders. It is believed that the neuropathic form of AMC involves a deterioration in the anterior horn cell leading to muscle weakness and fibrosis.[46]

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.[4] There is a rare autosomal recessive form of the disease known to exist.[7]

In May 2013, scientists at the Max Planck Institute for Molecular Genetics in Berlin reported they had found mutations of the zinc-finger gene ZC4H2 to be the cause of AMC and intellectual disability. The clinical picture is variable as the severity of the disease depends on the position of the mutated amino acid in the protein. If the substitution is in a position that plays an important role in the functioning of the protein, a so-called zinc-finger domain, the most severe form of the disease arises and the affected boys die in the early months or years after birth. Girls and women with a mutation in this gene or a complete loss of the gene on one of the two X chromosomes can also be affected. [1]


DiagnosisEdit

To date, no prenatal diagnostic tools are available to test for the condition. Diagnosis is only used to rule out other causes. This is done by undertaking muscle biopsies, blood tests and general clinical findings rule out other disorders and provides evidence for AMC.[5]

Treatment Edit

While there is no reversal of this condition, individual quality of life can be greatly improved. As each person will respond differently, and will have different needs, a combination of therapies is beneficial. Physical therapy including stretching, strengthening, and mobility training are often provided to improve flexion and range of motion to increase mobility. Occupational therapy (may also include casting, splinting of affected joints) can include training in ADL and fine motor skills as well as addressing psychosocial and emotional implications of living with a disability. Since there is a variety of mobility impairments, individually tailored orthopaedic correction is often beneficial. Orthopedic surgery, which include osteotomy or external Ilizarov fixator, may be elected to correct severely affected joints and limbs and symptoms such as clubfoot, hernia repair and correction of unilateral hip dislocation, in cases where these surgeries improve quality of life. However, in most cases, the contractures would recur despite surgery. A surgery called Tendon Release is usually done to stretch out the tendon that makes most patients walk on their toes.

PrognosisEdit

File:AMCTraveler.jpg

Individuals with AMC are aided by vigorous therapy and in some cases surgical intervention. This varies to some degree, depending on the severity of mobility reduction.[5] AMC is not a progressive disorder. Typically these individuals have normal cognition and speech and therefore the potential for productive, rewarding, and independent lives.

EpidemiologyEdit

AMC is relatively rare occurring in 1 out of every 3,000 live births.[5][8] Amyoplasia, characterized by fatty and fibrous tissue replacement of the limb muscles, is the most common form, at 43% of reported cases.[47] The majority of individuals thrive, with a minority strongly affected by respiratory muscle involvement.

Affected peopleEdit

See alsoEdit

ReferencesEdit

  1. 1.0 1.1 ARTHROGRYPOSIS - Page Has Moved
  2. Arthrogryposis
  3. 3.0 3.1 3.2 3.3 AMC (arthrogryposis multiplex congenita) definition - Medical Dictionary definitions of popular medical terms easily defined on MedTerms
  4. 4.0 4.1 4.2 Congenital Syndromes Database Closed
  5. 5.0 5.1 5.2 5.3 5.4 5.5 5.6 http://www.dpo.uab.edu/~birmie/amc.htm
  6. 6.0 6.1 6.2 Alfonso I., Papazian O., Paez J.O., Grossman J.A.I (2000). Arthrogryposis Multiplex Congenita. International Pediatrics 15 (4): 197–204.
  7. 7.0 7.1 7.2 NORD - National Organization for Rare Disorders, Inc
  8. 8.0 8.1 8.2 Orthoseek | Orthopedic Topics | Arthrogryoposis
  9. 9.0 9.1 9.2 Arthrogryposis definition - Medical Dictionary definitions of popular medical terms easily defined on MedTerms
  10. Donohue M, Bleakney DA. Arthrogryposis Multiplex Congenita. In: Campbell SK ed. Physical Therapy for Children. Philadelphia, PA: WB Saunders; 1995:261-277.
  11. The Free Dictionary: Arthrogryposis. URL accessed on 11 July 2013.
  12. (1958)Arthrogryposis multiplex due to congenital muscular dystrophy. Pediatrics 22 (5).
  13. Banker B, Victor M, Adams R (1957). Arthrogryposis multiplex due to congenital muscular dystrophy. Brain 80 (3): 319–34.
  14. Template:RareDiseases
  15. Stoll C, Alembik Y, Finck S, Janser B (1992). Arthrogryposis, ectodermal dysplasia and other anomalies in two sisters. Genet. Couns. 3 (1): 35–9.
  16. ORPHA1139 Arthrogryposis - epileptic seizures - migrational brain disorder. Orphanet.ORPHANET - About rare diseases - About orphan drugs
  17. ORPHANET - About rare diseases - About orphan drugs
  18. Template:RareDiseases
  19. CTD: Disease Not Found
  20. CTD: Disease Not Found
  21. Template:RareDiseases
  22. Template:RareDiseases
  23. Arthrogryposis Multiplex Congenita, Distal - What does AMCD stand for? Acronyms and abbreviations by the Free Online Dictionary
  24. CTD: Disease Not Found
  25. Arthrogryposis multiplex congenita, distal, x-linked - What does AMCX1 stand for? Acronyms and abbreviations by the Free Online Dictionary
  26. OMIM 301830
  27. ORPHANET - About rare diseases - About orphan drugs
  28. Cat.Inist
  29. Gordon Syndrome
  30. http://www.medinet.lk/journals/CMJ/2001/december/arthrogryposis.htm
  31. Arthrogryposis Multiplex Congenita, Neurogenic Type - What does AMCN stand for? Acronyms and abbreviations by the Free Online Dictionary
  32. CTD: Disease Not Found
  33. CTD: Disease Not Found
  34. ORPHANET - About rare diseases - About orphan drugs
  35. Leichtman L, Say B, Barber N (1980). Primary pulmonary hypoplasia and arthrogryposis multiplex congenita. J. Pediatr. 96 (5): 950–1.
  36. Illum N, Reske-Nielsen E, Skovby F, Askjaer S, Bernsen A (1988). Lethal autosomal recessive arthrogryposis multiplex congenita with whistling face and calcifications of the nervous system. Neuropediatrics 19 (4): 186–92.
  37. CTD: Disease Not Found
  38. ORPHANET - About rare diseases - About orphan drugs
  39. Template:RareDiseases
  40. Template:RareDiseases
  41. ORPHANET - About rare diseases - About orphan drugs
  42. Template:RareDiseases
  43. Schrander-Stumpel C, Höweler C, Reekers A, De Smet N, Hall J, Fryns J (1993). Arthrogryposis, ophthalmoplegia, and retinopathy: confirmation of a new type of arthrogryposis. J. Med. Genet. 30 (1): 78–80.
  44. Di Rocco M, Callea F, Pollice B, Faraci M, Campiani F, Borrone C (1995). Arthrogryposis, renal dysfunction and cholestasis syndrome: report of five patients from three Italian families. Eur. J. Pediatr. 154 (10): 835–9.
  45. Template:RareDiseases
  46. Berkow R ed. The Merck Manual of Diagnosis and Therapy. 16th ed. . Rathway, NJ: Merck Research Laboratories;1992:2075
  47. Hall JG (1997). Arthrogryposis multiplex congenita: etiology, genetics, classification, diagnostic approach, and general aspects. J Pediatr Orthop B 6 (3): 159–66.
  48. American Journal of Nursing
  49. The X Factor's Simon Cowell is won over by disabled 13-year-old Rion Paige on season première | Mail Online. Dailymail.co.uk. URL accessed on 2013-10-02.

External linksEdit


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