Oral Pathology Chapter 15 Flashcards
What is the name of the cyst that originates by the separation of the follicle from the crown of an unerupted tooth?
Dentigerous Cyst
What is the name of the cyst that originates by the separation of the follicle from the crown of an unerupted tooth?
Dentigerous Cyst
How large does a dentigerous cyst have to be to be considered a dentigerous cyst?
3 + mm
What is the most common developmental cyst?
Dentigerous cysts
What tooth is the most commonly affected by dentigerous cysts?
Mandibular 3rds
What is the soft tissue analogue of a dentigerous cyst?
Eruption Cyst
What age group has eruption cysts most often?
What is the other name given to eruption cysts?
Eruption Hematomas
What pathology arises from the rests of the dental lamina, is associated with a syndrome and has a relatively high recurrence rate?
Odontogenic Keratocyst
What is the other name for Odontogenic Keratocyst?
Keratocystic Odontogenic Tumor
Where is the most common location of Odontogenic Keratocysts?
Posterior mandible
What are two unique things about the growth of a Odontogenic Keratocyst?
- It grows from posterior to the anterior and 2. It doesn’t cause bone expansion
How often are unerupted teeth involved in Odontogenic Keratocysts?
1/3 the time
What makes curettage difficult in Odontogenic Keratocyst cases?
The wall is thin and friable
What makes curettage difficult in Odontogenic Keratocyst cases?
The wall is thin and friable
How large does a dentigerous cyst have to be to be considered a dentigerous cyst?
3 + mm
What is the most common developmental cyst?
Dentigerous cysts
What tooth is the most commonly affected by dentigerous cysts?
Mandibular 3rds
What is the soft tissue analogue of a dentigerous cyst?
Eruption Cyst
What age group has eruption cysts most often?
Less than 10 years old
What is the other name given to eruption cysts?
Eruption Hematomas
What pathology arises from the rests of the dental lamina, is associated with a syndrome and has a relatively high recurrence rate?
Odontogenic Keratocyst
What pathology is a developmental odontogenic cyst that typically occurs along the lateral root surface?
Lateral Periodontal Cyst
Where is the most common location of Odontogenic Keratocysts?
Posterior mandible
What are two unique things about the growth of a Odontogenic Keratocyst?
- It grows from posterior to the anterior and 2. It doesn’t cause bone expansion
How often are unerupted teeth involved in Odontogenic Keratocysts?
1/3 the time
What are the three things we should know about the histology of Odontogenic Keratocysts?
- Basal cell layer shows palisading and is hyperchromatic, 2. Epithelium is wavy or corrugated by parakeratin and 3. Satellite cysts (daughter cysts) move away from the main lesion
What makes curettage difficult in Odontogenic Keratocyst cases?
The wall is thin and friable
What syndrome is associated with having multiple Odontogenic Keratocysts at a young age?
Gorlin Syndrome
What characteristic, if seen in a radiograph, is pathognomonic for Odontogenic Keratocysts?
Teeth displaced to the inferior border of the orbit
What tooth is the most common to be affected by buccal bifurcation cysts?
1st mandibular molars
What are the four main symptoms of Gorlin Syndrome?
- Multiple basal cell carcinomas in sunless areas, 2. Odontogenic Keratocysts, 3. Calcification of the Falx Cerebri and 4. Rib anomalies (splayed/bifid)
What is the technical name of Gorlin Syndrome?
Nevoid Basal Cell Carcinoma Syndrome
What pathology is the soft tissue counterpart to the lateral periodontal cyst?
Gingival Cyst of the Adult
What is derived to create a Gingival cyst of the adult?
Rest of Serres
What area is most likely to develop a gingival cyst of the adult?
Mandibular Canine and premolar area
What pathology is a developmental odontogenic cyst that typically occurs along the lateral root surface?
Lateral Periodontal Cyst
Should a lateral periodontal cyst develop as a polycystic lesion, what is that called?
Botryoid Odontogenic Cysts
What is the pathology usually found in the incisor-canine areas that is unilocular lesion and that has an association with odontomas 20% of the time?
Calcifying Odontogenic Cysts
What is the other name for Calcifying Odontogenic Cysts?
Gorlin Cysts
What ratio of Calcifying Odontogenic Cysts are associated with teeth?
1/3
What histopathologic feature is associated with Calcifying Odontogenic Cysts?
Ghost cells
What is the recurrence rate for multicystic ameloblastomas?
50-90%
What ratio of Buccal Bifurcation cysts have bilateral involvement?
1/3
What tooth is the most common to be affected by buccal bifurcation cysts?
1st mandibular molars
What term is used to describe a pathology with features of conventional ameloblastomas, but that shows metastatic deposits (most likely in the lungs)?
Malignant Ameloblastoma
What is the origin of ameloblastomas?
Odontogenic Epithelial Origin
What are the three different types of ameloblastomas and what is the chance of getting each one?
- Conventional solid/multicystic 85%, 2. Unicystic 15% and 3. Peripheral 1%
What ages have an equal chance of getting an ameloblastoma?
30-70
What gender is more likely to get an ameloblastoma?
Neither - equal probability
Where do ameloblastomas typically occur?
85% in the mandible - usually the ascending ramus area
What are the two descriptive terms used to describe Ameloblastomas?
- Soap Bubble or 2. Honeycombed
What is sometimes present in Adenomatoid Odontogenic Tumors that differentiate it from dentigerous cysts?
Snowflake Calcifications
What are the six forms of ameloblastomas?
- Follicular (most common), 2. Plexiform (2nd most common), 3. Acanthomatous (keratin), 4. Granular cell, 5. Basal cell (very rare) and 6. Desmoplastic
What form of ameloblastoma does not share forms with the others as it has predilection for the anterior maxilla and may be mixed radiolucent-opaque due to osseous metaplasia?
Desmoplastic form
What are the two key histopathologies present in ameloblastomas?
- Palisading and 2. Reverse polarity
What is the recurrence rate for multicystic ameloblastomas?
50-90%
What disease is a painless, nonulcerated, sessile gingival lesion?
Peripheral Ameloblastoma
Where are peripheral ameloblastomas most often found?
Posterior gingival mucosa, mandible more common
What pathology has cytologic malignant features and follows an aggressive course later in life?
Ameloblastic Carcinomas
What pathology occurs in patients between age 10 and 20, typically occurs in the anterior jaws, tends to be in the maxilla and is twice as likely to be in females?
Adenomatoid Odontogenic Tumor
How are Adenomatoid Odontogenic Tumors typically found?
When X-rays are taken to find out why a tooth hasn’t erupted
What describes the lesion in 75% of Adenomatoid Odontogenic Tumors?
Unilocular radiolucency involving the crown on an unerupted tooth
What tooth is most likely to get an adenomatoid odontogenic tumor?
Canine
What typically differentiates Adenomatoid Odontogenic Tumors from dentigerous cysts?
Radiolucency extends apically past CEJ
What is sometimes present in Adenomatoid Odontogenic Tumors that differentiate it from dentigerous cysts?
Snowflake Calcifications
What pathology is seen radiographically around the crown of an impacted tooth and has the appearance of “driven-snow”?
Calcifying Epithelial Odontogenic Tumor
What is the other name give to Calcifying Epithelial Odontogenic Tumors?
Pindborg Tumors
What histologic test can be run to test for Calcifying Epithelial Odontogenic Tumors?
Amyloid-like extracellular material tests positive for Congo red and turns apple-green under polarized light
When calcification form in rings in Calcifying Epithelial Odontogenic Tumors, what is that called?
Liesegang Rings
What pathology is the most common odontogenic tumor?
Odontoma
What pathology is the most clinically significant odontogenic tumor?
Ameloblastoma (high recurrence rate)
What will turn into an odontoma if given enough time?
Ameloblastic Fibromas
Should a lesion be classified as a developmental anomaly instead of a true neoplasm, what is that called?
Hamartomas
What type of odontoma is composed of multiple, small, tooth-like structures?
Compound odontoma
What type of odontoma is composed of a conglomerate mass of enamel and dentin?
Complex odontoma
What is the average age that a patient has an odontoma?
15
Where are compound odontomas most likely to occur?
Anterior maxilla
Where are complex odontomas most likely to occur?
Molar regions
