Chronic nonbacterial osteomyelitis (CNO) is an autoinflammatory bone disease of unknown cause. While some patients develop unifocal and time-limited disease, most experience chronically active or recurrent disease affecting multiple bones, known as chronic recurrent multifocal osteomyelitis (CRMO). CNO is most frequently diagnosed in children and adolescents but can extend into adulthood.

This working group will be working on getting endorsement on an OMERACT Core Domain Set.