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Chapter VIIITumor of Oral Maxillofacial Region;icyst;Cysts of soft tissue;Sebaceous cyst;Sebaceous cyst;Sebaceous cyst;Sebaceous cyst;Sebaceous cyst; Of all the epidermoid cysts encountered throughout the body
only 7% occurs in the head and neck area
oral cavity accounting for only 1.6%
Intraorally benign slow growing and painless entity
usually located in submandibular/sublingual/submental region
cause symptoms of dysphagia and dyspnoea
malignant transformation potential
treatment of choice :Surgical excision ?;Dermoid/epidermoid cyst;Dermoid/epidermoid cyst;Dermoid/epidermoid cyst; Epidermoid cyst
- where in the cystic cavity is lined with epithelium without skin appendages.
Dermoid cyst
- here the epithelial lined cystic cavity encloses skin appendages such as hair, hair follicles, sebaceous, and sweat glands.; floor of the mouth in the midline is most favored site
occasional occurrence involving:
buccal mucosa
tongue
lips
uvula
temporomandibular joint
mandible
maxilla;differential diagnosis
ranula
blockage of Whartons ducts
lipoma
thyroglossal duct cyst
cystic hygroma
infection…; Recurrences are unusual
Reports of malignant transformation of sublingual dermoid and epidermoid to squamous carcinoma and basal cell carcinoma are present
A 5% rate of malignant transformation of the teratoid variety of oral dermoid cysts has also been quoted in literature?;Epidemiology
most common congenital anomaly of the neck
2-4% of all neck masses
most commonly present in the first decade of life
but also may be seen in adults.;Thyroglossal tract cyst/fistula;Thyroglossal tract cyst;Thyroglossal tract cyst/fistula;Thyroglossal tract cyst/fistula;Thyroglossal tract cyst;Thyroglossal tract cyst/fistula; thyroglossal tract arises from?foramen caecum
at junction of anterior 2/3 and posterior 1/3 of the tongue
Any part of the tract can persist causing a sinus, fistulae or cyst
Most fistulae are acquired following rupture or incision of infe
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