Sternocostal diseases

Selection of differential diagnoses for unilateral sternoclavicular joint swelling:

- Mechanical enthesopathy: overload syndromes, trauma

- Inflammatory enthesitis: Peripheral spondyloarthritis (e.g. psoriatic arthritis, SAPHO syndrome, reactive arthritis), endocrinopathies (e.g. diabetes, hypothyroidism), crystal arthropathies (e.g. gout, CPPD)

- Arthritis: Septic, inflammatory rheumatic diseases (e.g. rheumatoid arthritis, peripheral spondyloarthritis), crystal arthritis (e.g. gout, CPPD)

- Osteitis/ osteomyelitis: Septic, aseptic (e.g. SAPHO syndrome, CRMO), osteitis clavicularis condensans

- Subluxation: Traumatic with ligamentous lesions, Benign subluxation (especially women, dominant side), Articular hyperlaxity

- Osteoarthritis: Primary (rare), secondary (in all other diseases mentioned), with or without subluxation

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