Abstract
Heterotopic ossification is an abnormal bone formation after surgery or without any reason. Large joint, such as hip and knee joint, is a known most common site. Operation itself and postoperative early range of motion exercise are risk factors. We present a case of heterotopic ossification mimics neurogenic tumor after high tibial osteotomy.
References
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Figure 1.
Plain radiograph of the right knee showing 2×2 cm sized calcified mass in the posterior knee joint (arrow).
![jkbjts-19-92f1.tif](/upload/SynapseXML/0164jkbjts/thumb/jkbjts-19-92f1.gif)
Figure 3.
Preoperative magnetic resonance image shows 3×2.5×2 cm sized tumor arising from tibial nerve in popliteal region. (A) Axial T1weighed MR image shows inhomogeneous low signal intensity. (B) Axial T2 weighted MR image shows heterogeneous high signal intensity. (C) Axial gadolinum enhanced MR image shows heterogeneous enhanced mass.
![jkbjts-19-92f3.tif](/upload/SynapseXML/0164jkbjts/thumb/jkbjts-19-92f3.gif)