To Alophysio

Your point is quite true, I just remembered seeing a lady with a fractured pelvis that was missed on xray...you would need quite a lot of distraction of the Wikipedia reference-linkSIJ to feel the effects on LLD. In this womans case literally a fractured pelvis or pubis symphysis shearing, and in both cases the pain would not make it possible to walk easily as the assymmetry would be too great for the load...it would make more sense to look higher for the distortion that would give an apparent LLD

Good point there