PMC3172983_01
The semihard, painless, slowly evolving augmentation in the submental area.
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fig1
A 21-year-old female patient came to the consultation unit of the maxillafacial surgery department to be examined for a semihard, painless, slowly evolving submental augmentation which had appeared 5 years before (Figure 1).
The (ECHO) ultrasonic scan of the area showing a sizeable infrasonic formation with distinct boundaries.
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fig2
The (ECHO) ultrasonic scan showed an infrasonic formation with distinct boundaries (Figure 2).
The computed tomography (CT) of the submental area showing a semitransparent cystic formation with distinct boundaries.
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fig3
The computed tomography (CT) showed a semitransparent cystic formation with distinct boundaries (Figure 3) while the scintiscan of the area with a Tc99m showed no evidence of the existence of ectopic thyroid tissue (Figure 4). 
The scintiscan of the area with a Tc99m showing no evidence of the existence of ectopic thyroid tissue.
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fig4
The computed tomography (CT) showed a semitransparent cystic formation with distinct boundaries (Figure 3) while the scintiscan of the area with a Tc99m showed no evidence of the existence of ectopic thyroid tissue (Figure 4). 
The macroscopic image of the surgical l extract with clear evidence of cystic formation (6,5 cm) containing smegma and hairs, indicative of a dermoid cyst.
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fig5
Macroscopically, the cyst (6,5 cm long) was found to contain smegma and hairs, (Figure 5) indicative of a dermoid cyst, confirmed by a pathoanatomical examination which showed a cystic capsule lined by keratinized stratified squamous epithelium and skin glands attached (Figure 6).
Cyst with keratinized squamous epithelium and adnexal structures in wall.
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fig6
Macroscopically, the cyst (6,5 cm long) was found to contain smegma and hairs, (Figure 5) indicative of a dermoid cyst, confirmed by a pathoanatomical examination which showed a cystic capsule lined by keratinized stratified squamous epithelium and skin glands attached (Figure 6).
PMC3172983_02
The augmentation in the floor of the mouth due to the intraoral projection of the augmentation.
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fig7
Keratinizing squamous epithelium with distinct granular layer with a sebaceous gland in the cyst wall.
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fig8
The (ECHO) ultrasonic scan of the area showing a sizeable infrasonic formation with distinct boundaries.
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fig9
The (ECHO) ultrasonic scan of the area (Figure 9) showed a sizeable infrasonic formation with distinct boundaries.
Section of computed tomography (CT) showing a sizeable cystic formation with distinct boundaries.
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fig10
The computed tomography (CT) showed a sizeable cystic formation with distinct boundaries (Figure 10), while the scintiscan of the area with a Tc99m showed no evidence of the existence of ectopic thyroid tissue (Figure 11). 
The scintiscan of the area with a Tc99m showing no evidence of the existence of ectopic thyroid tissue.
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fig11
The computed tomography (CT) showed a sizeable cystic formation with distinct boundaries (Figure 10), while the scintiscan of the area with a Tc99m showed no evidence of the existence of ectopic thyroid tissue (Figure 11). 
The macroscopic image of the surgical extract showing the cystic formation (5,4 cm) of our second case.
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fig12
The clinical findings bore evidence of a cyst in the floor of the mouth with an infection which was surgically treated via intraoral approach, removing a 5.4 cm long cyst (Figure 12).