Dermoid Cyst
A cyst of the midline of the upper neck of the anterior floor of the mouth of young patients derived from remnants of embryonic skin consisting of a lumen lined by a keratinizing stratified squamous epithelium and containing one or more skin appendages such as hair, sweat, or sebaceous glands.
- It is an example of cystic teratoma
- Derived from germinal epithelium entrapped during embryonic development
Clinical features
- It is present in young adults
- Present in the upper neck or floor of the mouth
- Present as painless swelling
- It has doughy consistency
- It is 2cm or less in diameter
Histopathological features
- The lining is orthokeratinized squamous epithelium.
- Exhibiting a variable number of dermal appendages such as hair follicles sebaceous glands and erector pili muscles.
- Lumen is filled with desquamated keratin sebum and hair shafts.
- There is a sorrounding zone of compressed connective tissue.
- Generally free of inflammation.
Epidermoid cyst
- Same as dermoid cyst but skin appendages are absent.
- Treatment is surgical enucleation.
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