Cysts Flashcards
What is a cyst?
Pathological cavity filled with fluid, semi fluid or gasseous contents , NOT created by accumulation of pus
Can be wholly or partly lined by epithelium
Can be epithelial or non epithelial
What is a Radicular cyst?
Give the clinical presentation
Give the radiographic presentation
Give the Histological presentation
Give the Cyst content
Most common Inflammatory odontogenic cysts
Ass with non vital tooth
Arises from the proliferation of Rests of Malassez (derived form the remnants of Hertwigs epithelial root sheath)
Clinical presentation
- Asymptomatic non vital teeth
- Most common maxilla
Radiographic
- Round/ovoid radiolucency at root apex
- Unilocular / well defined
- Uniform radiolucency
Histo
- Reg lining of non keratinsed strat squamous epithelium
- Deposits of cholestrol
- Vascular capsule
- Inflammatory infiltrate
Cystic contents
- Varies from watery/straw coloured fluid to semi-brown coloured fluid
Txt
- Simple enucleation and removal ass tooth
What is an inflammatory collateral cyst? Give the two options
Give the clinical presentation
Give the radiographic presentation
Give the Histological presentation
Paradental cyst (most common inflam collateral cyst)
Ass with PE M3M due to inflammation form pericornitis
Radio
- Well definied radiolucency related to neck or coronal 1/3 of root
Histo (resembles radicular)
- Reg lining of non kertainsed stat squamous epithelium
- Deposits of cholesterol
- vascular capsule
- Inflammatory infiltrate
Mandibular buccal bifurcation
- Occur in children
- Usually on the buccal aspect of erupting 1st molar
Give the main odontogenic development cysts
Dentigerous cyst
Odontogenic keratocyst
Orthokeratinised cyst
Basal cell naevus syndrome
Gingival cyst
Lateral periodontal cyst
Glandular odontogenic cyst
Calcifying odontogenic cyst
Give the non odontogenic cysts
Nasiolabial cyst
Nasopalatine cyst
Give the non-epithelial cysts
Solitary bone cysts
Aneurysmal bone cyst
Stafnes idiopathic bone cyst
What is a dentigerous cyst ?
Give the clinical presentation
Give the radiographic presentation
Give the Histological presentation
Give the Cyst content
Most common odontogenic development cyst
Clinical
- Ass with vital tooth
- Attached to CEJ and encompassess all/part of crown of unerupted tooth
- Lined with epithelium derived from reduced enamel epithelium form enamel organ
- Ass with impacted M3M
Radio
- Round/ovoid well defined unilocular radiolucency
- Uniform
- Attached to crown of unerupted tooth
Histo
- Thin reg layer of non keratinsed strat squamous epithelium
- No rete pegs and no inflammatory infiltrate
Cyst content
- Proteinacecous yellow fluid
- Cholestrol crystals common
What is an eruption cyst?
- Overlies erupting tooth
- Odontogenic development cyst
- Histo same as dentigerous
- txt conservatively and wait until tooth erupts (may need sugical excision sometimes)
What is an odontogenic keratocyst?
Give the clinical presentation
Give the radiographic presentation
Give the Histological presentation
Give the Cyst content
Odontogenic development cyst
Arises from remnant of dental lamina (cell rests of Serres)
High risk of recurrence as it enlarges in AP direction and can get large without bony expansion
Mandible males most common
Radio
- Oval well definied uniform radiolucency
- Uni or multi locular
Histo
- Lined by thin folded parakeratinsed start squamous epithelium
- Thin CT wall
- Uninflammed
Cyst content
- Thick , grey / white cheesy material with keratinous debris
What is an Orthokeratinsed odontogenic cyst?
Give the clinical presentation
Give the radiographic presentation
Give the Histological presentation
Give the Cyst content
Uncommon devlopmental cyst
Sim presentation to OKC
Radio
- Unilocular without epithelial proliferation or satellte cyst
Histo
- Prom orthokeratinisation
- Flattened basal cell layer
What is Basal cell naevus syndrome (Gorlin Goltz)?
Give the skeletal and facial features
Autosomal dom trait
Multiple OKC
Abnormalities of Ca and PO4 metabolism
Skeletal abnorm
- Rib and vertebrea
- Calcification of the falx cerebri
Facial features
- Frontal and temporalparietal bossing
- Hypertrophism
- Mild mandibular prognathsism
What are gingival cysts? Give the presentation in adults and children
Odontogenic devlopment cysts
Derived from remannts of dental lamina (rests of serres) in gingival or alveolar ST
Adults
- mandibular attached gingivae as <1cm pink / bluish sessile swelling
- Thin lining of stat squamous epi
Infants
- Bohns nodules (com 90% neonates)
- Small yellow/cream nodules on edentulous alveolar mucosa
What is a lateral periodontal cyst?
Give the clinical presentation
Give the radiographic presentation
Give the Histological presentation
What is a varient of this called?
Rare Odontogenic development cyst
Ass with lateral surface of tooth root in vital tooth
Radio
- Well demarcated radiolucent area
Histo
- Thin strat squamous epi
- Rests of serres of dental lamina
Simple enucleation
Botryoid odontogenic cyst
- Variant of lateral periodontal cyst
- Large
- Increase recurrence
What is a nasopalatine cyst?
Give the clinical presentation
Give the radiographic presentation
Give the Histological presentation
Give the Cyst content
Most common non odontogenic epithelial cyst
Originates from epithelial remnants of naso-palatine duct
Slowly enlarging swelling in anterior region midline palate
radio
- Well defined round / ovoid or heart shaped radiolucency
- Sclerotic margin
Histo
- Lined by strat squamous and cuboidal or respiratory epi
- Neurovasclar bundles found in the capsule
What is Solitary bone cyst?
Non epithelial jaw cyst
pre molar molar region
Radio
- Radiolucency varies in size, irreg outline , mod well defined
- Scalloping as primary feature
No detectable lining
