Tpr at 19:24, 15 April 2021

2021-04-15T19:24:27Z

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{{For|the mysterious historical phenomenon also known as "St. Vitus' dance"|Dancing mania}}
{{Infobox medical condition (new)
| name = Sydenham's chorea
| synonyms = Chorea minor, St Vitus' dance
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== Other names ==
Sydenham chorea (SC), Rheumatic encephalitis, Chorea minor, St Vitus' dance.

== Pathophysiology ==
{{PAGENAME}} is a neurological disorder of childhood resulting from infection via Group A beta-hemolytic streptococcus ([[GABHS]]), the bacterium that causes [[rheumatic fever]].

== Clinical features ==
SC is characterized by rapid, irregular, and aimless involuntary movements of the arms and legs, trunk, and facial muscles.

== Sex distribution ==
It affects girls more often than boys and typically occurs between 5 and 15 years of age.

[[File:Erythema marginatum.jpg|thumb|right|alt=Classic rash of rheumatic fever|Erythema marginatum]]
== Signs and symptoms ==
Some children will have a sore throat several weeks before the symptoms begin, but the disorder can also strike up to 6 months after the fever or infection has cleared. Symptoms can appear gradually or all at once, and also may include uncoordinated movements, muscular weakness, stumbling and falling, slurred speech, difficulty concentrating and writing, and emotional instability.
The symptoms of SC can vary from a halting gait and slight grimacing to involuntary movements that are frequent and severe enough to be incapacitating. The random, writhing movements of chorea are caused by an auto-immune reaction to the bacterium that interferes with the normal function of a part of the brain (the [[basal ganglia]]) that controls motor movements.

== Distribution ==
Due to better sanitary conditions and the use of antibiotics to treat streptococcal infections, rheumatic fever, and consequently SC, are rare in North America and Europe. The disease can still be found in developing nations.

== Treatment ==
There is no specific treatment for SC. For people with the mildest form, bed rest during the period of active movements is sufficient. When the severity of movements interferes with rest, sedative drugs, such as barbiturates or benzodiazepines, may be needed. [[Antiepileptic medications]], such as valproic acid, are often prescribed. Doctors also recommend that children who have had SC take penicillin over the course of the next 10 years to prevent additional manifestations of rheumatic fever.

== Prognosis ==
Most children recover completely from SC, although a small number will continue to have disabling, persistent chorea despite treatment. The duration of symptoms varies, generally from 3 to 6 weeks, but some children will have symptoms for several months. Cardiac complications may occur in a small minority of children, usually in the form of [[endocarditis]].

In a third of the children with the disease, SC will recur, typically 1 ½ to 2 ½ years after the initial attack. Researchers have noted an association between recurrent SC and the later development of the abrupt onset forms of obsessive-compulsive disorder, attention deficit/[[hyperactivity disorder]], [[tic disorders]], and [[autism]], which they call [[PANDAS]], for Pediatric Autoimmune Neuropsychiatric Disorders Associated with [[Streptococcus infection]].
{{stb}}
{{Medical resources
| DiseasesDB = 29245
| ICD10 = {{ICD10|I|02||i|00}}
| ICD9 = {{ICD9|392}}
| ICDO =
| OMIM =
| MedlinePlus = 001358
| eMedicineSubj =
| eMedicineTopic =
| MeshID = D002819
| SNOMED CT = 46826000
}}
{{Heart diseases}}
{{Gram-positive firmicutes diseases}}
{{DEFAULTSORT:Sydenham's Chorea}}
[[Category:Neurological disorders]]
{{neuro}}
[[Category:neurological disorders]]

Sydenham's chorea - Revision history

Tpr at 19:24, 15 April 2021