Risser sign
Pronunciation: RIS-ser
Radiographic indicator of skeletal maturity based on ossification of the iliac apophysis, used to assess spinal growth potential.
Full Definition
The Risser sign is a radiographic marker of skeletal maturity that assesses the degree of ossification of the iliac crest apophysis on anteroposterior pelvis or spine radiographs. The sign is graded from 0 to 5: Grade 0 indicates no ossification, Grades 1-4 represent progressive ossification from lateral to medial (25%, 50%, 75%, and 100% respectively), and Grade 5 indicates complete fusion of the apophysis to the iliac crest. This grading system is particularly valuable in pediatric orthopedics for assessing remaining spinal growth potential in patients with scoliosis, helping guide treatment decisions regarding bracing versus surgical intervention.
Usage
Usage note: Always specify the grade (0-5) and consider bilateral assessment if asymmetric.
In Context
- "The patient's Risser sign was Grade 2, indicating significant remaining growth potential and appropriateness for brace treatment." — scoliosis evaluation report
- "A Risser sign of Grade 4 or 5 suggests skeletal maturity and reduced likelihood of curve progression." — spine surgery consultation