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cyclic vomiting syndrome
Cyclic vomiting syndrome (US English) or cyclical vomiting syndrome (UK English) (CVS) is a chronic functional condition of unknown etiology characterised by recurring attacks of intense nausea, vomiting and sometimes abdominal pain, headaches or migraines. CVS typically develops during childhood, usually between ages 3 and 7; although it often remits during adolescence, it can persist into adult life.
==Patient characteristics==
The average age at onset is 3–7 years, but CVS has been seen in infants who are as young as 6 days and in adults who are as old as 73 years. Typical delay in diagnosis from onset of symptoms is 2.7 – 3 years.〔 Females show a slight predominance over males; the female-to-male ratio is 57:43.〔 CVS occurs in all races but seems to disproportionately affect Caucasians. Many people often lose the ability to eat and suffer from a loss of throat functions.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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