Source of Error in Clinical Assessment of Innominate Rotation

Abstract

The sacroiliac joint (SIJ) is a possible source of low back pain or dysfunction. Various methods of visually assessing the relative position of the innominate to the sacrum have been used to evaluate SIJ dysfunction. The purpose of this special communication is to describe how a false-positive interpretation of innominate rotation may occur when a leg-length difference exists and visual assessment is used.