Anterior chest wall (most common site, 65-90% of patients):[citation needed] Hyperostosis, sclerosis and bone hypertrophy especially involving the sternoclavicular joint, often with a soft tissue component. (wikipedia.org)
A rare rheumatologic disease characterised by predominantly bilateral, chronic, sterile inflammation and progressive sclerosis and hyperostosis of the sternocostoclavicular joint, with adjacent soft tissue ossification, in the absence of other joint involvement. (cdc.gov)
Soft tissue ossification1
A rare, benign rheumatologic disorder or syndrome characterized by hyperostosis and soft tissue ossification between the clavicles and the anterior part of the upper ribs. (nih.gov)
The term SAPHO (an acronym for synovitis, acne, pustulosis, hyperostosis, osteitis) was coined in 1987 to represent this spectrum of inflammatory bone disorders that may or may not be associated with dermatologic pathology. (wikipedia.org)