Inclusion Criteria:  Adult Patient with a CRMO with pediatric-onset disease (> 18years) Patient who was informed and agreed to participate in this study  Exclusion Criteria:  Patients with Monogenic auto-inflammatory disease associated with osteolytic bone lesions (e.g. interleukin-1 receptor antagonist deficiency) Patient with Majeed syndrome Patient without sufficient imaging data to confirm the presence of one or more inflammatory lesions Patients with incomplete data. Patients placed under legal protection, guardianship or curatorship