Background. Amyoplasia is the most commonly seen diagnostic subgroup o
f children with arthrogryposis. The natural history of these children
has not been well described previously. Methods. Review of the medical
records of 38 children with amyoplasia enabled us to describe their b
irth characteristics, therapeutic interventions, and functional outcom
es. Results. Eighty-four percent of the children had symmetrical, four
-limb involvement, which was similar to the original descriptions of a
myoplasia, at birth. There was an average of 5.7 orthopedic procedures
per child, and the children had multiple castings and splintings of t
heir limbs and participated in physical and occupational therapy on a
regular basis. By the age of 5 years, 85% were ambulatory, most were r
elatively or completely independent in their activities of daily livin
g, and most were in regular classrooms at the appropriate grade level.
Conclusion. Although children with amyoplasia have pronounced musculo
skeletal involvement at birth, which requires orthopedic and rehabilit
ative interventions during their childhood, their functional outcome i
n both physical and educational areas is excellent.