Chronic recurrent multifocal osteomyelitis-3 (CRMO3) is an autosomal dominant autoinflammatory bone disease characterized by early childhood onset of bone pain and arthritis caused by sterile osteomyelitis. The disorder results from constitutive activation of the IL1-mediated inflammatory pathway due to loss of IL1 receptor sensitivity to its antagonist IL1RN (147679). et al. (2023) suggested the term 'Loss of IL1R1 Sensitivity to IL1RA (IL1RN)' or 'LIRSA' as a designation for this disorder.
For a discussion of genetic heterogeneity of CRMO, see 609628. [from
OMIM]