Fig. 1

Characteristic radiological, scintigraphic and histological features of sternocostoclavicular hyperostosis in a 33-year-old woman with a 12-year history of SCCH. a Computed tomographic (CT) oblique sternal-coronal view of the sternocostoclavicular region showing the characteristic sclerosis and hyperostosis of the medial end of the left clavicle with reactive joint changes corresponding to the site of increased radioisotope uptake on skeletal scintigraphy. b Volume-rendered CT-scan showing the characteristic widening of the affected medial end of the left clavicle due to hyperostosis. c Technetium-99 m skeletal scintigraphy showing intense uptake of the radioisotope in the left sternoclavicular region. d Light micrograph of a biopsy of the bony lesion showing bony trabeculae with irregular kit-lines, with scattered lymphocytes and fibrosis of the marrow (hematoxylin and eosin stain; front objective 10× magnification)