Term
| Most common odontogenic cyst |
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Definition
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Term
| Describe radiographic features of PA cysts |
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Definition
Unilocular radiolucency
Long-standing cysts; root resorption |
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Term
| Clinical features of PA cysts |
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Definition
3rd to 6th decades
Maxilla-anterior teeth
Mandible-posterior teeth
Asymptomatic
Nonvital tooth |
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Term
| Are PA cysts symptomatic or asymptomatic? |
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Definition
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Term
| Where are PA cysts in maxilla and mandible? |
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Definition
| Anterior maxilla, posterior mandible |
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Term
| What are the microscopic features of PA cyst? |
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Definition
| Cyst lined by a stratified squamous epithelium |
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Term
| When thinking of PA cysts, what is included in the differential diagnosis? |
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Definition
| PA granuloma, PA scar, PA cemento-osseous dysplasia (early stage), odontogenic tumors, central giant lesion, traumatic bone cyst, metastatic lesion |
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Term
| What are treatments for PA cysts? |
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Definition
| Endodontic therapy if the tooth is restorable, extraction if the tooth is not restorable, curettage of the apical zone, residual cyst may develop if the cyst was incompletely removed |
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Term
| What is the second most common odontogenic cyst? |
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Definition
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Term
| Clinical features of dentigerous cysts |
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Definition
2nd to 3rd decades
Slight male predilection
Impacted teeth--mandibular third molars and maxillary canines
Asymptomatic |
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Term
| Are dentigerous cysts symptomatic or asymptomatic? |
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Definition
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Term
| Describe radiographic features of dentigerous cysts |
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Definition
Well-defined unilocular or occasionally multilocular.
Radiolucency associated with crown of impacted tooth.
Reposition of roots of adjacent erupted teeth |
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Term
| What are the microscopic features of dentigerous cysts? |
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Definition
| Cyst lined by a nonkeratinized stratified squamous epithelium |
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Term
| When thinking of dentigerous cysts, what is included in the differential diagnosis? |
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Definition
| Enlarged dental follicle, ameloblastoma, OKC, AOT |
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Term
| What are treatments for dentigerous cysts? |
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Definition
| Removal of the associated tooth and surgical enucelation |
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Term
| Clinical features of lateral periodontal cysts |
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Definition
5th to 7th decades
Male predilection
Along the lateral root surface of a vital tooth/between the roots of vital teeth
Asymptomatic
75% to 80% mandibular premolar-canine-lateral incisor area |
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Term
| Are lateral periodontal cysts associated with vital or non-vital teeth? |
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Definition
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Term
| Describe radiographic features of lateral periodontal cysts |
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Definition
Well-defined radiolucency (less than 1.0 cm in greatest diameter)
"Tear-drop" shaped
Occasionally multiolocular radiolucency-botryoid odontogenic cyst |
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Term
| What are the microscopic features of a lateral periodontal cyst? |
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Definition
Cyst lined by a thin, nonkeratinized epithelium
Clusters of glycogen-rich, clear epithelial cells forming focal nodular thickenings of the cyst lining |
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Term
| When thinking of PA cysts, what is included in the differential diagnosis if unilocular? |
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Definition
| Lateral radicular cyst, OKC, odontogenic tumor (ameloblastoma, squamous odontogenic tumor) |
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Term
| When thinking of PA cysts, what is included in the differential diagnosis if multilocular? |
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Definition
| OKC, ameloblastoma, central giant cell lesion |
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Term
| How do you treat lateral periodontal cysts? |
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Definition
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Term
| Clinical features of odontogenic keratocysts |
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Definition
any age – peak incidence within 2nd and 3rd decades
Slight male predilection
Mandible: posterior portion of the body and the ramus region
Asymptomatic
Large lesions may be associated with pain,
swelling and drainage |
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Term
| Where do you see odontogenic keratocysts? |
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Definition
| Mandible: posterior portion of the body and the ramus region |
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Term
| Describe radiographic features of odontogenic keratocysts |
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Definition
Well- defined unilocular or multilocular radiolucency
40% associated with an unerupted tooth
Multiple cysts- Nevoid basal cell carcinoma syndrome (Gorlin syndrome) |
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Term
| What are the microscopic features of odontogenic keratocysts? |
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Definition
Cyst lined by parakeratinized stratified squamous epithelium
6 to 10 cell layers cells thick
Hyperchromatic and palisaded basal cell layer
Corrugated parakeratotic surface
Keratin filled lumen
Satellite cysts |
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Term
| When thinking of odontogenic keratocysts, what is included in the differential diagnosis if unilocular/multilocular associated with a tooth? |
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Definition
| Dentigerous cyst, ameloblastoma, odontogenic myxoma, AOT and ameloblastic fibroma |
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Term
| When thinking of odontogenic keratocysts, what is included in the differential diagnosis if unilocular/multilocular non-associated with a tooth? |
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Definition
| Central giant cell lesion, traumatic bone cyst and aneurismal bone cyst |
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Term
| How do you treat a odontogenic keratocyst that is a small lesion? |
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Definition
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Term
| How do you treat a odontogenic keratocyst that is a large lesion? |
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Definition
| More extensive surgical resection, marsupialization |
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Term
| What is the recurrence rate of odontogenic keratocysts? |
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Definition
| High recurrence rate: 10%-30% |
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Term
| Clinical features of orthokeratinized odontogenic cysts |
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Definition
Age: Young adults
Male predilection (2:1)
Mandible – posterior areas
Asymptomatic |
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Term
| Where do you find orthokeratinized odontogenic cysts? |
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Definition
| Posterior areas of mandible |
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Term
| Radiographic features of orthokeratinized odontogenic cysts |
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Definition
Well-defined unilocular radiolucency, occasionally multilocular
Commonly associated with an unerupted mandibular third molar |
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Term
| What are the microscopic features of orthokeratinized odontogenic cysts? |
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Definition
| Cyst lined by a orthokeratinized stratified squamous epithelium |
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Term
| When thinking of orthokeratinized odontogenic cysts, what is included in the differential diagnosis? |
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Definition
| Dentigerous cyst, OKC, ameloblastic fibroma, ameloblastoma |
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Term
| What are treatments for orthokeratinized odontogenic cysts? |
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Definition
| Removal of the associated tooth, enucleation and curettage |
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Term
| Clinical features of orthokeratinized odontogenic cysts |
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Definition
Age: Young adults
Male predilection (2:1)
Mandible – posterior areas
Asymptomatic |
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Term
| Where do you find orthokeratinized odontogenic cysts? |
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Definition
| Posterior areas of mandible |
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Term
| Radiographic features of orthokeratinized odontogenic cysts |
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Definition
Well-defined unilocular radiolucency, occasionally multilocular
Commonly associated with an unerupted mandibular third molar |
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Term
| What are the microscopic features of orthokeratinized odontogenic cysts? |
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Definition
| Cyst lined by a orthokeratinized stratified squamous epithelium |
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Term
| When thinking of orthokeratinized odontogenic cysts, what is included in the differential diagnosis? |
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Definition
| Dentigerous cyst, OKC, ameloblastic fibroma, ameloblastoma |
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Term
| What are treatments for orthokeratinized odontogenic cysts? |
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Definition
| Removal of the associated tooth, enucleation and curettage |
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Term
| Clinical features of granular odontogenic cysts |
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Definition
Age: Wide age range – 2nd to 9th
decades
M=F
80% to 85% - anterior mandible
Jaw expansion – locally aggressive
It tends to cross the midline. |
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Term
| Where do you find odontogenic cysts? |
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Definition
| anterior mandible (80% to 85%) |
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Term
| Odontogenic cyst associated with jaw expansion |
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Definition
| granular odontogenic cyst |
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Term
| Describe radiographic features of granular odontogenic cysts |
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Definition
| Well-defined multilocular radiolucency, occasional unilocular |
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Term
| What are the microscopic features of granular odontogenic cysts? |
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Definition
| Cyst lined by a nonkeratinized squamous epithelium. Focal mucous cells, pseudocysts. Occasionally, cilia may be noted |
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Term
| When thinking of granular odontogenic cysts, what is included in the differential diagnosis? |
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Definition
| central giant cell lesion, ameloblastoma |
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Term
| What are treatments for granular odontogenic cysts? |
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Definition
Enucleation and curettage en bloc resection
30% recurrence rate |
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Term
| What is the recurrence rate of granular odontogenic cysts? |
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Definition
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Term
| Clinical features of calcifying odontogenic cysts? |
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Definition
Age: 2nd to 3rd decades
Some authors mention female predilection
Some authors mention 70% of COCs are
seen in the maxilla
65% - in the incisor and canine areas
It may be associated with cortical expansion
13% to 30% of cases are peripheral (extraosseous) |
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Term
| What is another name for calcifying odontogenic cysts? |
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Definition
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Term
| Which odontogenic cyst has a potential female predilection? |
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Definition
| Calcifying odontogenic cyst (Gorlin's cyst) |
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Term
| Where in the mouth do you find calcifying odontogenic cysts? |
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Definition
incisor and canine areas (65%)
maxilla (70%) |
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Term
| Radiographic features of calcifying odontogenic cysts? |
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Definition
Well-defined unilocular or multilocular radiolucency
Within the radiolucency there may be scattered, irregular radiopacities
1/3 of the cases are associated with an unerupted tooth
May cause tooth resorption or divergence of
adjacent teeth |
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Term
| What are the microscopic features of calcifying odontogenic cysts? |
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Definition
| Cyst lined by ameloblastic-like epithelial cells, basal cell palisading, ghost cells, dysplastic dentin |
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Term
| What is the differential diagnosis of calcifying odontogenic cysts if there is a radiolucent lesion? |
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Definition
| Dentigerous cyst, OKC, ameloblastoma |
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Term
| What is the differential diagnosis of calcifying odontogenic cysts if there is a mixed radiolucent/radiopaque lesion? |
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Definition
| AOT, CEOT, odontoma, ameloblastic fibroma |
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Term
| How do you treat calcifying odontogenic cysts? |
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Definition
| Enucleation, removal of the associated tooth (cases associated with an unerupted tooth) |
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Term
| Clinical features of eruption cysts |
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Definition
Age: Children younger that age 10
Translucent swelling in the gingival mucosa overlying the crown of an erupting deciduous or permanent tooth
Purplish-brown color – eruption hematoma
Molar and maxillary incisors |
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Term
| Where do you find eruption cysts in the oral cavity? |
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Definition
| molar and maxillary incisors |
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Term
| Describe radiographic features of eruption cysts |
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Definition
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Term
| Microscopic features of eruption cysts |
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Definition
| Cyst lined by a thin layer of nonkeratinizing squamous epithelium |
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Term
| Differential diagnosis of eruption cyst |
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Definition
| diagnostic clinical appearance |
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Term
| Treatment of eruption cysts |
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Definition
| Not treatment; some cases may need simple excision of the roof of the cyst to permit eruption of the tooth |
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Term
| Clinical features of gingival cyst of the newborn |
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Definition
Age: Newborn
Multiple whitish nodules along the alveolar ridge
Maxilla more affected than mandible
May occur along the midline of the palate (Epstein’s pearls)
Asymptomatic |
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Term
| What is another name for gingival cyst of the newborn? |
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Definition
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Term
| Where do you find gingival cyst of the newborn? |
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Definition
| maxilla, along midline of the palate (Epstein's pearls) |
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Term
| Describe radiographic features of gingival cyst of the newborn |
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Definition
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Term
| Microscopic features of gingival cyst of the newborn |
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Definition
| Cyst lined by a thin, flattened epithelium with a parakeratotic surface. The lumen contains keratinaceous debris |
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Term
| Treatment of gingival cyst of the newborn |
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Definition
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Term
| Clinical features of gingival cyst of the adult |
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Definition
Age: 5th to 6th decades
60% to 75% - Mandibular canine and premolar area
Facial gingival or alveolar mucosa
Painless, bluish or bluish–gray domelike swelling usually less than 0.5 cm in diameter |
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Term
| Where do you find gingival cyst of the adult in the oral cavity? |
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Definition
| mandibular canine and premolar area; facial gingiva or alveolar mucosa |
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Term
| Radiographic findings of gingival cyst of the adult |
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Definition
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Term
| Microscopic features of the gingival cyst of the adult |
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Definition
| Cyst lined by a thin, flattened epithelium. With or without focal plaques that contain clear cells |
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Term
| What is included in the differential diagnosis of the gingival cyst of the adult? |
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Definition
| Mucocele, parulis, peripheral odontogenic tumor |
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Term
| What is the treatment for the gingival cyst of the adult? |
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Definition
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Term
| Cyst(s) lined by a stratified squamous epithelium |
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Definition
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Term
| Cyst(s) lined by a nonkeratinized stratified squamous epithelium |
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Definition
| dentigerous cyst, granular odontogenic cyst, eruption cyst |
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Term
| Cyst(s) lined by a thin, nonkeratinized epithelium |
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Definition
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Term
| Cyst(s) that have clusters of glycogen-rich, clear epithelial cells forming focal nodular thickenings of the cyst lining |
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Definition
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Term
| Cyst(s) lined by a orthokeratinized stratified squamous epithelium |
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Definition
| orthokeratinized odontogenic cyst |
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Term
| Cyst(s) lined by ameloblastic-like epithelial cells |
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Definition
| calcifying odontogenic cyst (Gorlin's cyst) |
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Term
| Cyst(s) lined by a thin, flattened epithelium with a parakeratotic surface |
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Definition
| gingival cyst of the newborn (Bohn's nodules) |
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Term
| Cyst(s) lined by a thin, flattened epithelium |
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Definition
| gingival cyst of the adult |
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Term
| Cyst(s) with no radiographic findings |
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Definition
| eruption cyst, gingival cyst of the newborn (Bohn's nodules)< gingival cyst of the adult |
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