Floor of mouth dermoid cyst
Incidental finding during CT Cervical spine for trauma.
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Soft tissue density mass containing internal fat seen within the left floor of mouth/sublingual space, displacing adjacent tongue intrinsic and extrinsic muscles.
Paramedian location and internal fat content raise possibility of this being a dermoid cyst.
These are rare lesions. Exact etiology is not entirely delineated. Some believe they are developmental, associated with inclusion error resulting in entrapped cells that subsequently develop into ectodermal, mesodermal and endodermal tissues.
Most come to attention when they become symptomatic eg from mass effect, infection.