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Risser sign

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Dorlands/Elsevier
  
p_10/12623123

Risser sign

The Risser sign is an indirect measure of skeletal maturity, whereby the ossification stage of the iliac apophysis is used to judge the ossification of the spinal vertebrae. On a scale of 5, it gives a measure of progression of ossification; the grade of 5 means that skeletal maturity is reached. Risser sign is based on the observation of an X-ray image.

  • Grade 1 is given when the ilium (bone) is calcified at a level of 25%; it corresponds to prepuberty or early puberty.
  • Grade 2 is given when the ilium (bone) is calcified at a level of 50%; it corresponds to the stage before or during growth spurt.
  • Grade 3 is given when the ilium (bone) is calcified at a level of 75%; it corresponds to the slowing of growth.
  • Grade 4 is given when the ilium (bone) is calcified at a level of 100%; it corresponds to an almost cessation of growth.
  • Grade 5 is given when the ilium (bone) is calcified at a level of 100% and the iliac apophysis is fused to iliac crest; it corresponds to the end of growth.

    • The Risser sign is referenced in clinical decision-making regarding adolescent idiopathic scoliosis. The earlier the Risser Grade, the greater the likelihood of a scoliosis progressing to the point it becomes clinically significant and requires intervention.

    The correlation was first described by Risser in 1958, with a graded classification scheme developed at a later time.

    References

    Risser sign Wikipedia
    (Text) CC BY-SA


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