Risser Sign

The measurement used to evaluate skeletal maturity or completed growth, graded on a scale from 0 -5: 0 indicates much potential growth remains and 5 indicates skeletal maturity. The Risser sign is determined from an x-ray image of the pelvis and references the appearance of a crescent-shaped line of bone formation – visualize a mushroom cap – which appears across the top of each side of the pelvis on an AP or PA x-ray image.