PMC4860923_01
Extraorally, a swelling was noticed on the left side of face
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F1
A 22-year-old female came with the chief complaint of swelling over the left front side of the face since 4 months [Figure 1].
Intraorally, the swelling was seen involving the left canine and extending up to the second premolar
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F2
Intraorally, the swelling appeared to be arising from the labial vestibule extending up to the second premolar of the left side [Figure 2].
Radiograph showing well-defined radiolucency and resorption of teeth
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F3
The orthopantomography revealed unilocular radiolucency associated with 11, 12, 21, 22, 24 and root resorption in relation to 21, 22, 24 with missing 23 [Figure 3].
Photomicrograph showing the spindle cells arranged in herringbone pattern (H&E stain, x40)
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F4
The cells were arranged in fascicular pattern with few areas showing herringbone pattern of arrangement [Figure 4].
Lesional cells showing positivity for vimentin (IHC stain, x200)
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F5
The cells showed immunoreactivity for vimentin [Figure 5].
Few areas showing round cells (H& E stain, x400)
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F6
There were few areas showing round cells [Figure 6].
The lesional cells were separated from the overlying epithelium by a zone of connective tissue (H&E stain, x40)
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F7
Under low power the lesional cells were separated from the overlying epithelium by a zone of connective tissue. [Figure 7].
Dysplastic spindle cells arranged in herringbone pattern (H&E stain, x200)
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F8
Under high power the typical herring bone pattern was seen [Figure 8].