Fig. 3From: Predictors of cervical myelopathy and hydrocephalus in young children with achondroplasiaAfter the cord was divided longitudinally into 4 sections based on ‘Cord thickness C2’, cord indentation was graded (grade 1: < 25%, A; grade 2: ≥ 25%, B) at the anterior and posterior parts. The ‘Indentation index’ was calculated by adding the grades of the ‘Anterior indentation’ and ‘Posterior indentation’Back to article page