Fig. 1From: Modified unilateral iliac screw fixation with partial reduction in the treatment of high-grade spondylolisthesis at L5/S1 in adult patients: introduction of key technique, report of clinical outcomes and analysis of spinopelvic parametersSchematic diagram of measurements of spondylolisthesis on lateral radiograph. (a). measurement of the transitional component of spondylolisthesis per Meyerding grade; (b). measurement of Dubousset’s lumbosacral angle; (c) measurement of Boxall’s slip angleBack to article page