Unusual orientation of talar osteochondral fragment: a case report.

The identification of the correct orientation of an osteochondral fragment can be challenging. Orthopaedists have been able to take advantage of advanced imaging techniques to provide guidance to the appropriate surgical intervention. Many advancements have been made in imaging modalities specific to articular cartilage [Fischbach F, Bruhn H, Unterhauser F, Ricke J, Wieners G, Felix R, et al. Magnetic resonance imaging of hyaline cartilage defects at 1.5T and 3.0T: comparison of medium T2-weighted fast spin echo, T1-weighted two-dimensional and three-dimensional gradient echo pulse sequences. Acta Radiol 2005;46(1):67-73 [Erratum in: Acta Radiol 2005;46(April (2)):218]] Furthermore, with the increasing use of bioabsorbable fixation pins, it is imperative that careful attention is paid to the correct orientation of the fragment that is to be fixed. Without awareness of the orientation, it is possible that the 180° displaced fragment could potentially be fixed in this position. At the time of this report, the patient in this case was 6 weeks postoperative and reported 0/10 pain with full painless range of motion without instability. Our goal with this case report is to promote awareness among orthopaedists and radiologists alike regarding the importance of recognizing the orientation of an osteochondral fragment and/or defect of the talus. The patient was informed that data concerning the case would be submitted for publication, and he consented.