Abstract
Synovitis, Acne, Pustulosis, Hyperostosis, Osteitis (SAPHO) syndrome is a rare and complex multisystem autoimmune condition with a unique clinical presentation. It typically starts in the young to middle aged, causing pustular dermatosis and inflammation of the bone, joints and entheses of the anterior chest wall. SAPHO involves a unique pattern of innate immune system dysregulation and likely microbial interaction, sharing some pathological mechanisms with spondyloarthritis and pustular dermatosis. Diagnosis requires recognition of characteristic features and the exclusion of mimics including infection, malignancy and other autoimmune diseases. Characteristic bone changes may be seen on radiography, CT, MRI or bone scan. Acute treatment commonly involves anti-inflammatory agents, corticosteroids, or bisphosphonates while prolonged disease activity may warrant biologic medications. Tumour necrosis factor inhibitors have the most supporting data from case series, and other biologics used to treat inflammatory arthritis and pustular skin disease have encouraging case reports.
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Truong, S., Nash, P. (2022). SAPHO Syndrome. In: Ravindran, V., Santhanam, S., Goyal, M. (eds) Rarer Arthropathies. Rare Diseases of the Immune System. Springer, Cham. https://doi.org/10.1007/978-3-031-05002-2_5
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