Tags: Anatomical Structure, Bone.
The Risser sign refers to the amount of calcification of the human pelvis as a measure of maturity. 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.
