PMC3125644_01
Extraoral swelling on the right body of the mandible
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A 9-year-old boy reported to the Department of Oral and Maxillofacial Pathology, SIBAR Institute of Dental sciences, with an asymptomatic extraoral swelling on the right body of the mandible, which had been evident for 2 months [Figure 1]. It was hard and nontender on palpation [Figure 1].
Panoramic radiograph revealing faint periosteal reaction in the vicinity of permanent first molar and developing tooth buds of right canine and premolars
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The periosteal bone reaction was noted [Figure 2].
The axial CT view in bone window showing a massive periosteal reaction on the buccal surface, demonstrating the sclerotic borders of the lesion with soft tissue density within the central zone
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The lesion appears to have soft tissue density within the central zone as seen from this window, suggesting that the lesion is of soft tissue region [Figure 3].
Spindle cells arranged in interlaced fascicular pattern, showing elongated nuclei with blunt ends
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The cells were predominantly spindle shaped and showed elongated nuclei with fusiform or blunt ends [Figure 4].
The tumor was positive for vimentin
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The tumor was positive for alpha-smooth muscle actin [Figure 5] and vimentin [Figure 6] and negative for S-100 protein and desmin.
The tumor was positive for alpha-smooth muscle actin
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The tumor was positive for alpha-smooth muscle actin [Figure 5] and vimentin [Figure 6] and negative for S-100 protein and desmin.