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Case Reports in Medicine
Volume 2010, Article ID 794594, 5 pages
Case Report

Synostosis of the Proximal Tibiofibular Joint

2nd Orthopaedic Department, Aristotle University of Thessaloniki, “G. Gennimatas” Hospital, 54635 Thessaloniki, Greece

Received 4 January 2010; Accepted 8 April 2010

Academic Editor: Peter Michael Kroisel

Copyright © 2010 Nikolaos K. Sferopoulos. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The incidence of synostosis of the proximal tibiofibular joint (TFJ) was assessed among 1029 patients examined for osteoarthritis of the knee in a 4-year period. Radiographic evidence of a synostosis of the proximal TFJ was demonstrated in 3 knees (3 patients). The synostosis appeared incidental and was not the cause of symptoms in any of them. These patients were further examined with MRI and/or CT scans. In two cases, which were found to be primary (idiopathic), the synostosis was complete and bony. In a third case the lesion was secondary (acquired) to surgical reconstruction for a depressed fracture of the lateral tibial plateau. This iatrogenic complication followed open reduction, internal fixation, and grafting with synthetic bone. The bridging of the joint on the CT views was partial and compatible with ectopic calcification rather than ossification. The patients were treated conservatively and were followed for an average period of 3 years. No evidence that the synostosis accelerated the onset or progression of the degenerative changes to the ipsilateral knee could be verified.