1: Clin Orthop.  1985 Apr;(194):164-8.  

Sternocostoclavicular hyperostosis. A case report and review of the literature.

Goossens M, Vanderstraeten C, Claessens H.

Sternocostoclavicular hyperostosis (SCCH) or intersternocostoclavicular
ossification is a recently recognized disorder of unknown origin. SCCH is
characterized by painful, condensing hypertrophy of the sternum, both clavicles,
and the upper ribs. Since its original description by Sonozaki in 1974,
approximately 40 cases have been reported, mainly in the Japanese literature.
This peculiar hyperostotic syndrome is often misdiagnosed. The differentiation
from osteitis deformans can be difficult. Clinically, the disease produces a
swelling in the upper chest area with persistent, pulling pain exacerbated by
cold and dampness. The condition is a nonspecific inflammatory syndrome.
Radiographs usually show symmetric hyperostosis of the sternal portions of the
clavicles, synostosis of the sternoclavicular joints, a thickened sternum, and
varying degrees of involvement of the upper ribs and intercostoclavicular space.
Biopsy specimens reveal hyperostotic sclerosis of the cancellous bone. Although
the cause of the syndrome is unknown, clinical, radiologic, and histologic
findings indicate that it represents a distinct entity. The treatment of SCCH
remains symptomatic.

Publication Types:
    Case Reports

PMID: 3978909 [PubMed - indexed for MEDLINE]