PMC5427686_01
A, B Extraoral examination showing facial asymmetry with the chin point deviated to the right. C, D, E Unilateral posterior crossbite on the right side and open bite on the left side.
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F1
Clicking sound was observed on opening and closing the mouth (Fig. 1).
A. Panoramic radiograph showed a radiopaque area on the left condylar region with similar density to the adjacent bone. B. PA skull showed a well defined bony overgrowth extending medially from the left condyle, facial asymmetry and deviation of mandible to the right side.
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F2
Postero-anterior (PA) skull showed a well defined bony overgrowth extending medially from the left condyle, facial asymmetry and deviation of mandible to the right side (Fig. 2).
A, B Axial and coronal CBCT images showed a large bony mass arising from the left mandibular condyle extending anteriorly, posteriorly, medially and superiorly to the temporal bone. The lesion density was continuous with the structures of mandibular condyle.
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F3
The lesion density was continuous with the structures of the mandibular condyle (Fig. 3).
Histopathologic examination revealed small and large cancellous bones covered in some parts by cartilaginous cap (arrow).
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F4
This finding was consistent with osteochondroma, which was the final diagnosis of this lesion (Fig. 4).