CYSTS

Question 1

Wall relatively uninflamed with thin & irregular lining & edentulous in the area

Answer 1

Residual cyst

Question 2

What cyst derive from Rest of Malassez

Answer 2

Radicular cyst
Residual cyst

Question 3

What is the formation of a radicular cyst

Answer 3

• chronic inflammation in the periradicular tissues causing a periapical granuloma
• stimulates rest of malassez
• central degradation & necrosis

Question 4

What cyst is rare, asymptomatic, uni- locular, lateral to tooth & adjacent teeth vital

Answer 4

Lateral periodontal cyst

Question 5

What cysts are dervived from reduced enamel epithelium

Answer 5

Dentigerous cyst

Question 6

Which cyst is associated with impacted teeth, evenloped to CEJ and radiolucent

Answer 6

Dentigerous cyst

Question 7

What cyst has no radiopacities/ radiolucencies but appear blue & overlie incisors

Answer 7

eruption cyst

Question 8

What cysts are dervived from dental lamina

Answer 8

Odontogenic keratocst

Question 9

Which cysts have a spreading growth pattern, presence of satellite cysts

Answer 9

odotonogenic keratocytes

Question 10

What gene are OKC development associated with

Answer 10

PTCH gene (tumour suppressor gene) responsbile for basal cell carcinomas

Question 11

What cyst has a :
- corrugated surface
- lined by parakeratinised stratified squamous
- basal epithelial layer is well defined

Answer 11

Odontogenic keratocyte

Question 12

What makes odontogenic keratocytes consistent with neoplasms

Answer 12

high occurence rate
premative (spreading) recurrence rate
aggressive behaviour

Question 13

What cyst has a high reoccurence rate, more common in the mandible- body/ ramus

Answer 13

odontogenic keratocyte

Question 14

What cyst presents radiographically as:
- well defined- rounded/ scalloped margins
- unilocular/ multilocular
envelope tooth

Answer 14

odontogenic keratocyte

Question 15

What is mutliple odontogenic keratocytes indicitative of?

Answer 15

Gorlin gotz syndrome

Question 16

What is gorlin goltz syndrome

Answer 16

• 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)

Question 17

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

Answer 17

Calcifying epithelial odontogenic tumour

Question 18

What presents as
Mixed density lesion, benign and slow growing usually involving developing tooth

Answer 18

calcifying epithelial odontogenic tumour

Question 19

What presents as a radiolucency beneath the inferior alveolar nerve

Answer 19

Stafne bone cyst

Question 20

What cysts are non-epithelial lined

Answer 20

aneurysmal bone cyst
solitary bone cyst

Question 21

What cyst slowly expands, aggressive, cyst like lesion, typically contains blood filled spaces

Answer 21

aneurysmal bone cyst

Question 22

how does a solitary bone cyst present

Answer 22

non-epithelial lined, incidental
- vital tooth
sometimes contains blood-stained serous fluid/ gas

aetiology: unknown, potential trauma
peaks 2nd decade

Question 23

What epithelium do nasopalatine cysts dervive from

Answer 23

epithelial remnants of Jacobson’s organ

Question 24

What is the mechanism for the formation of nasopalatine cyst

Answer 24

1. entrapement of epithelium (remnant spof jacbsons organ) during embrylogical fusion of maxilla
2. stimulated by trauma, bacterial infections and retention of mucous

Question 25

How do nasopalatine cysts present

Answer 25

well defined, round, ovoid/ heart shaped

Question 26

What presents as an inverted pear shape radiolucency between laterals and canines

Answer 26

Globulomaxillary cyst

Question 27

What presents as a midline radiolucency that is an inverted pear

Answer 27

Medial palatal cyst

Question 28

What presents as a radiolucency between roots of teeth & scalloped appearance

Answer 28

solitary bone cyst

Question 29

How does aneurysmal bone cyst present

Answer 29

- uni/ multilocular - irregular outline- soap like appearance - displace roots

Question 30

What epithelium do sublingual dermoid & dermoid cysts arise from?

Answer 30

retention of germinal epithelium (embryonic process)

Question 31

How do sublingual/ dermoid cysts present

Answer 31

deep, filled with keratin, slow growing and can affect speech/ swallowing

Question 32

what do brachial cleft cysts arise from

Answer 32

second brachial cleft

Question 33

How do brachial cleft cysts present

Answer 33

USUALLY SIDE OF NECK loor of mouth/ posterior tongue - asymptomatic (lateral aspects of neck, anterior border of sternocleidmastoid) typically young children/ adults- tonsilar. base

Question 34

what are thyroglossal cysts derived from?

Answer 34

thyroglossal duct due to foramen cecum migrating down to thyroid gland

Question 35

How does a thyroglossal cyst present and how is it diagnosed

Answer 35

midline swelling diagnosis: - swallow & protrude tongue- see how it moves - thyroid scan

Question 36

Where do mucous retention/ mucous extravasation cysts arise from?

Answer 36

salivary gland tissue

Question 37

How does a plunging ranula present

Answer 37

extends through mylohyoid & neck - affect speech and swallowing - exicison with intra-oral and extra-oral - use of MRI to aid

Question 38

what does mckechnie mean when he says rationale

Answer 38

- underlying problem - consequence of underlying problem - how does tx address the problem

Question 39

What are the benefits for decompression

Answer 39

- low risk -preserves vital structures - preserves teeth

Question 40

What is meant by 'decompression'

Answer 40

Opens a window into the cyst- place a plastic tube & reduces size of lesion

Question 41

What are the risks associated with decompression

Answer 41

- hygiene - compliance - sometimes tricky - second procedure maybe needed

Question 42

What is enucleation

Answer 42

removal of the lesion in its entirety

Question 43

What are the benefits of enucleation

Answer 43

- entire specimen is removed so it is curative

Question 44

What are the risks of enucleation

Answer 44

- surgically challenging - need to preserve vital structures - risk of pathological fracture