Fig. 3From: High prevalence of sacroiliitis and early structural changes in the sacroiliac joint in children with enthesitis-related arthritis: findings from a tertiary centre in Hong KongEarly structural damage lesions in a 10-year-old boy. A Axial T1 sequence showing joint surface irregularity (white arrow) at the left sacroiliac joint, representing erosion. B Coronal T1 sequence showing sclerotic areas (hypointense signal, white arrow) in the left iliac boneBack to article page