PMC5512416_01
Facial asymmetry with bony prominence on left side
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F1
It was extending from the upper border of zygomatic arch superiorly and medially up to body of zygoma [Figure 1].
Computed tomography scan showing well-delineated soft tissue mass in infratemporal and buccal space
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F2
CT scan features were consistent with a diagnosis of dermoid cyst [Figure 2].
Gross specimen showing cystic cavity
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F3
On cut section of the cystic lumen, the yellow-colored granular material was seen and stained for cystic content [Figure 3].
Cystic cavity lined by stratified squamous epithelium and foci of pseudostratified squamous epithelium (H and E, x10)
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F4
In some parts, the cyst was surrounded by an external layer of smooth muscle [Figures 4 and 5].
(a) High power magnification showing cystic lining with few goblet cells (H and E, x40) (b) Gastric glands underlying cystic lining (H and E, x10) (c) Hair shafts cut in transverse section (H and E, x10)
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F5
In some parts, the cyst was surrounded by an external layer of smooth muscle [Figures 4 and 5].