PMC3981343_01
The extra-oral swelling on the lower jaw (A) with an exophytic diffuse and irregular growth on gingiva (B). The imaging features with orthopantomograph (C) show no major findings whereas the computed tomography images (D and E) show an expansile, osteolytic lesion involving the alveolus.
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F1
On examination there was an exophytic growth on gingiva, which was diffuse and irregular in shape extending from 41 to 47, reddish in color, soft in consistency, tender and not fixed to underlying bone (Figure 1A and 1B). Orthopantomograph showed no major pathognomonic findings (Figure 1C). Computed tomography showed 3x3 cm sized, expansile, osteolytic lesion involving the alveolus and body of right side of the mandible (Figure 1D and 1E).
The hematoxylin and eosin stained photomicrographs under low power (A) and high power (B) shows small round to oval tumor cells arranged in an alveolar pattern on a mucinous background with Positive immunohistochemical expression of Pancytokeratin (C), Cd 99 (D), Vimentin (E) and Bcl 2 (F).
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F2
Immunohisto chemical staining was carried out and tumor cells showed immunopositivity for vimentin, pancytokeratin, Cd99 and bcl-2 (Figure 2) and negative for Cd31, Cd34 Cd45, Cd20, Cd1a, Cd3, Cd68, Cd45ro, Cd138, muscle specific actin (HHF-35), desmin and myogenin.