The Journal of Bone and Joint Surgery, Vol 65, Issue 7 900-905, Copyright © 1983 by Journal of Bone and Joint Surgery, Inc
When is arthrography indicated in Legg-Calve-Perthes disease?
JM Gallagher, DS Weiner and AJ Cook
We evaluated plain radiographs and arthrograms of twenty-one children with
active Legg-Calve-Perthes disease in order to determine the value of the
arthrography. We found that when epiphyseal protrusion was shown by the
arthrograms it could be seen on the plain radiographs as well in all
patients. Also, an acetabulum-head index of less than 90 or an
acetabulum-head quotient of less than 92 as determined on plain radiographs
correlated well with a diagnosis of protrusion. Thus, an arthrogram is not
necessary to make the diagnosis of protrusion in most patients. The
arthrogram is more useful in delineating changes in the articular surface
for prognoses concerning arthritis and in tailoring the treatment to the
individual patient.