Where there is a difference in leg length the pelvis is generally seen to deviate to the higher side if the patient stands with weight equally distributed on both legs.
The shoulder is typically seen to be lower on the side where the pelvis is higher.
Deviation of the pelvis to one side can be the result of a difference in leg length; in this case the pelvis deviates to the higher side.
More frequently it is the result of (usually minor) scolioses, the pelvis being horizontal.
In the case of true pelvic obliquity the iliac crest and anterior and posterior iliac spines are lower on one side.
The rhomboid of Michaelis is formed by the:
1. Dimples above the PSISs
2. Spinous process of L5
3. Uppermost point of the intergluteal cleft.
Deviation of the upper end of the intergluteal cleft to one side is the result of asymmetrical positioning of the inferior end of the sacrum and coccyx.
‘Pelvic distortion’ – Lateral deviation w/ contralateral transverse rotation.