Sternocostoclavicular hyperostosis.

Sternocostoclavicular hyperostosis is a chronic arthro-osteitis affecting mostly juxtasternal structures. It is characterized clinically by painful swelling of the upper anterior chest wall and occasionally is associated with pustulosis palmaris and plantaris. Pathologically there is osteitis, periostitis, and new bone formation of periarticular structures. Two patients are described, and the clinical, laboratory, and radiological findings of 251 reported cases in the English literature are reviewed.