Three cases have been presented of a syndronme occurring in pregnant women. This syndrome is characterized by pain of varying severity in one or both hips or thighs and develops in the last trimester of pregnancy. Roentgenograms show a spotty demineralization with sharply localized margins, involving one or both femoral heads, a small part of the femoral neck, and the acetabulum. In each of the three patients, the pain subsided and the roentgenographic appearance returned to normal within several months after delivery.
We do not know the cause of this syndrome, but suspect it to be of neurogenic origin.