Risser sign

Pelvis
Female type pelvis
Male type pelvis
Identifiers
Dorlands /Elsevier	p_10/12623123
TA
TH	{{#property:P1694}}
TE	{{#property:P1693}}
FMA	{{#property:P1402}}
Anatomical terms of bone [[[d:|edit on Wikidata]]]

The Risser sign refers to 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

Greulich WW, Pyle SI: Radiographic Atlas of Skeletal Development of the Hand and Wrist, 2nd edition. Stanford, . CA: Stanford University Press, 1959.

External links

• http://www.e-radiography.net/radpath/r/risser-sign.htm