Dysplasia epiphysealis capitis femoris? A longitudinal observation.

From the age of 22 months, a boy with bilateral dysplasia of the femoral heads has been followed clinically and radiologically for over seven years. Initial ascertainment came through his mild but persistent waddling gait. The patient is of small stature with normal linear growth parallel to the third percentile. Hypothyroidism was ruled out. Fixed traction applied at 5 6/12 years for almost 3 months promptly relieved the one episode of hip pain but did not alter the favorable natural course. The hip dysplasia in this proband may differ from the type of dysplasia epiphysealis capitis femoris originally defined by Meyer. As has been recognized by others, the latter probably represents several related disorders instead of only a single nosological entity. Considerations on differential diagnosis, prognosis, and management are offered.