CYSTS Flashcards
Wall relatively uninflamed with thin & irregular lining & edentulous in the area
Residual cyst
What cyst derive from Rest of Malassez
Radicular cyst
Residual cyst
What is the formation of a radicular cyst
- chronic inflammation in the periradicular tissues causing a periapical granuloma
- stimulates rest of malassez
- central degradation & necrosis
What cyst is rare, asymptomatic, uni- locular, lateral to tooth & adjacent teeth vital
Lateral periodontal cyst
What cysts are dervived from reduced enamel epithelium
Dentigerous cyst
Which cyst is associated with impacted teeth, evenloped to CEJ and radiolucent
Dentigerous cyst
What cyst has no radiopacities/ radiolucencies but appear blue & overlie incisors
eruption cyst
What cysts are dervived from dental lamina
Odontogenic keratocst
Which cysts have a spreading growth pattern, presence of satellite cysts
odotonogenic keratocytes
What gene are OKC development associated with
PTCH gene (tumour suppressor gene) responsbile for basal cell carcinomas
What cyst has a :
- corrugated surface
- lined by parakeratinised stratified squamous
- basal epithelial layer is well defined
Odontogenic keratocyte
What makes odontogenic keratocytes consistent with neoplasms
high occurence rate
premative (spreading) recurrence rate
aggressive behaviour
What cyst has a high reoccurence rate, more common in the mandible- body/ ramus
odontogenic keratocyte
What cyst presents radiographically as:
- well defined- rounded/ scalloped margins
- unilocular/ multilocular
envelope tooth
odontogenic keratocyte
What is mutliple odontogenic keratocytes indicitative of?
Gorlin gotz syndrome
What is gorlin goltz syndrome
- frontal and pareital bossing & broad nasal root
- mutiple BCC
- Multiple OKCs
- skeletal abnormalties (bidfi ribs & abnormalities in vertebrae)
- intra-cranial abnormalities ( calcification of falx cerbie)
What cyst presents in the posterior body of the mandible
- cystic with flecks of calcifciations
- roots of teeth are eroded in association with lesion
- has poorly defined margins
Calcifying epithelial odontogenic tumour
What presents as
Mixed density lesion, benign and slow growing usually involving developing tooth
calcifying epithelial odontogenic tumour
What presents as a radiolucency beneath the inferior alveolar nerve
Stafne bone cyst
What cysts are non-epithelial lined
aneurysmal bone cyst
solitary bone cyst
What cyst slowly expands, aggressive, cyst like lesion, typically contains blood filled spaces
aneurysmal bone cyst
how does a solitary bone cyst present
non-epithelial lined, incidental
- vital tooth
sometimes contains blood-stained serous fluid/ gas
aetiology: unknown, potential trauma
peaks 2nd decade
What epithelium do nasopalatine cysts dervive from
epithelial remnants of Jacobson’s organ
What is the mechanism for the formation of nasopalatine cyst
- entrapement of epithelium (remnant spof jacbsons organ) during embrylogical fusion of maxilla
- stimulated by trauma, bacterial infections and retention of mucous
How do nasopalatine cysts present
well defined, round, ovoid/ heart shaped
What presents as an inverted pear shape radiolucency between laterals and canines
Globulomaxillary cyst
What presents as a midline radiolucency that is an inverted pear
Medial palatal cyst
What presents as a radiolucency between roots of teeth & scalloped appearance
solitary bone cyst
How does aneurysmal bone cyst present
- uni/ multilocular
- irregular outline- soap like appearance
- displace roots
What epithelium do sublingual dermoid & dermoid cysts arise from?
retention of germinal epithelium (embryonic process)
How do sublingual/ dermoid cysts present
deep, filled with keratin, slow growing and can affect speech/ swallowing
what do brachial cleft cysts arise from
second brachial cleft
How do brachial cleft cysts present
USUALLY SIDE OF NECK loor of mouth/ posterior tongue
- asymptomatic (lateral aspects of neck, anterior border of sternocleidmastoid)
typically young children/ adults- tonsilar. base
what are thyroglossal cysts derived from?
thyroglossal duct due to foramen cecum migrating down to thyroid gland
How does a thyroglossal cyst present and how is it diagnosed
midline swelling
diagnosis:
- swallow & protrude tongue- see how it moves
- thyroid scan
Where do mucous retention/ mucous extravasation cysts arise from?
salivary gland tissue
How does a plunging ranula present
extends through mylohyoid & neck
- affect speech and swallowing
- exicison with intra-oral and extra-oral
- use of MRI to aid
what does mckechnie mean when he says rationale
- underlying problem
- consequence of underlying problem
- how does tx address the problem
What are the benefits for decompression
- low risk
-preserves vital structures - preserves teeth
What is meant by ‘decompression’
Opens a window into the cyst- place a plastic tube & reduces size of lesion
What are the risks associated with decompression
- hygiene
- compliance
- sometimes tricky
- second procedure maybe needed
What is enucleation
removal of the lesion in its entirety
What are the benefits of enucleation
- entire specimen is removed so it is curative
What are the risks of enucleation
- surgically challenging
- need to preserve vital structures
- risk of pathological fracture
