Document Detail

Bony island within the articular cartilage of the knee in a child: a rare condition for early osteoarthritis.
MedLine Citation:
PMID:  21808719     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Articular cartilage is a specific type of connective tissue composed of hydrated proteoglycans within a matrix of collagen fibrils. In the elderly population, it shows degenerative changes that may results in osteoarthritis. The more severe form of osteoarthritis occasionally demonstrates bone formation within the cartilage, which is designated as a bony protuberance, however, such lesions are rare in children. This report presents the case of a 10-year-old boy with a bony protuberance within the articular cartilage of the knee. The patient initially complained of knee pain and he subsequently developed flexion contracture. Radiological and arthroscopic examinations revealed a bony protuberance in the articular cartilage and degenerative changes of the cartilage above it. He was successfully treated by the removal of the bony protuberance and osteochondral grafting. The bony protuberance may have caused cartilage degradation since the thickness of the cartilage above it was thinner than that around the lesion. The bony protuberance within the articular cartilage formed in the younger population may be a possible cause of osteoarthritis. This case is a noteworthy with regard to the pathogenesis of osteoarthritis.
Taku Hatta; Takehiko Sugita; Toshimi Aizawa; Masahiro Ohnuma; Atsushi Takahashi; Eiji Itoi
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Orthopedic reviews     Volume:  3     ISSN:  2035-8164     ISO Abbreviation:  Orthop Rev (Pavia)     Publication Date:  2011 Mar 
Date Detail:
Created Date:  2011-08-02     Completed Date:  2011-11-10     Revised Date:  2013-07-19    
Medline Journal Info:
Nlm Unique ID:  101524779     Medline TA:  Orthop Rev (Pavia)     Country:  Italy    
Other Details:
Languages:  eng     Pagination:  e7     Citation Subset:  -    
Department of Orthopaedic Surgery, Tohoku University School of Medicine, Sendai;
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