Objective: Determination of the prevalence of arthrogryposis multiplex cong
enita in Western Australia as well as the causes of the condition. Overseas
reports varied considerably and no such survey had been conducted in Weste
rn Australia.
Methodology: Case names were obtained from various registers and records as
well as from private practitioners covering the 14 years birth cohort betw
een 1980 and 1993. The records, and where possible the patients, were seen
by one of the authors. Diagnosis was further established through relevant i
nvestigation where possible.
Results: Thirty cases were identified, giving a birth prevalence of approxi
mate to 1 in 12 000. In nine cases there were significant abnormalities of
the central nervous system, in seven cases anterior horn cell and/or periph
eral nervous involvement was the cause and in three there was primary muscl
e disease. The remaining 11 had various syndromes for which no definite neu
ropathological lesions could be demonstrated, but most of these had syndrom
es such as distal arthrogryposis or amyoplasia. Mortality was 37%. Talipes
occurred in 23 of 30 cases. Early intervention and, in more severe cases, r
adical surgical intervention was the management adopted in most cases.
Conclusion: The birth prevalence of arthrogryposis in Western Australia is
somewhat less than that reported in Canada and Finland but somewhat greater
than the Edinburgh figures, which appear to be the extremes quoted in the
literature. Prognosis is worse in cases with serious central nervous system
involvement and/or chest involvement, and better in cases of localised art
hrogryposis (e.g. distal), as well as in the specific syndrome of amyoplasi
a as described by Hall.