Tonsillar Ectopia in AIS - Pathogenic - Prognosis
Scoliosis Journal reported on tonsillar ectopia in adolescent idiopathic scoliosis: does it play a role in the pathogenesis and prognosis or is it only an incidental finding? Authors: Kasim Abul-Kasim, Angelica Overgaard, Magnus K. Karlsson and Acke Ohlin Published: 12 November 2009 Abstract (provisional) Background There is an ongoing controversy about the significance of tonsillar ectopia among patients with adolescent idiopathic scoliosis (AIS). Aim: To find out if tonsillar ectopia occurs more frequently among patients with AIS and if it plays any etiological or prognostic role in AIS. Study design: Retrospective study. Methods Retrospective analysis of 155 consecutive spine MRIs (79 patients with AIS and 76 controls; aged 7-25 years; 55 % were female) with regard to the position of the cerebellar tonsils in relation to foramen magnum and the sagittal diameter of foramen magnum. All images were evaluated independently by two neuroradiologists. Interobserver reliability analysis w...