The term "intrapelvic protrusion of the acetabulum" was translated by Daub1 from the German Intrapelvine Pfannenvorwölbung and pertains to a lesion of the hip joint. This title partially describes the pathologic process, suggests the picture seen on the roentgen films and is understandable. Many articles under various titles have been written, especially in the German literature, regarding the condition and its etiology. The prime purpose of this paper is to discuss the development of the acetabulum and its relationship to the etiology of the deep acetabulum and of intrapelvic protrusion.
The complaints of most patients suggest arthritis of one or both hips, frequently with no involvement of other joints. Pain and stiffness on change of position, with limited motion of the joint, are usual. The discomfort is aggravated by motion, and the patients often walk with an awkward gait or limp. Although the discomfort may be referred to one