Iliac apophyses. Prognostic value in idiopathic schliosis.

Fusion of the iliac apophyses with the crests of the ilium is of greater prognostic value than completion of excursion of the iliac apophyses. Completion of fusion of the vertebral ring apophyses coincides with fusion of the iliac apophyses to the crests. For accurate evaluation of the progression of the scoliotic curve, patients should be followed a few years after fusion of the iliac apophyses although progression after this stage is rare.