Chapter 15 lecture 2 Flashcards
What is the recurrence rate of an orthokeratinized odontogenic cyst?
-2%
Where is the most common place that the lateral periodontal cyst occurs?
-Mandibular canine and premolar area and lateral incisor area
What does a lateral periodontal cyst arise from?
-Rests of dental lamina
What age of pts do you find a lateral periodontal cyst in?
40-60
Are teeth vital or non vital in a lateral periodontal cyst?
-Vital
What is a botryoid odontogenic cyst?
-A multilocular (polycystic) lateral periodontal cyst
T/F Recurrence and/or malignant transformation of a lateral periodontal cyst is exceedingly common
False
-Exceedingly rare
What is a calcifying odontogenic cyst aka?
-Gorlin cyst
What did the WHO reclassify the calcifying odontogenic cyst as?
-Calcifying cystic odontogenic tumor
Where do you typically cyst a Gorlin cyst?
-Incisor-canine area equally in the mandible and maxilla
What is the avg age of a pt who gets a calcifying odontogenic cyst?
35
What cyst is associated with an odontoma?
-Calcifying odontogenic cyst
What histopathologic features are associated with a calcifying odontogenic cyst?
-Ghost cells that can calcify
What is a developmental cyst with glandular and/or salivary gland features?
-Glandular odontogenic cyst
What do you see in the radiolucencies in a calcifying odontogenic cyst?
-Radioopacities
What is the avg age of someone who gets a glandular odontogenic cyst?
-50
Do most of the cases of glandular odontogenic cysts occur in the maxillary or mandible?
-Mandible in the anterior jaws
What are four cysts that cross the midline
- Traumatic bone cyst
- Odontogenic keratocyst
- Glandular odontogenic cyst
- Central giant cell granuloma
What percent of Glandular odontogenic cysts will recur?
-30%
What type of resection is used to remove a glandular odontogenic cyst?
-En bloc
What is an inflammatory cyst with uncertain pathogenesis?
-Buccal bifurcation cyst
Where does a buccal bifurcation cyst characteristically develop at?
-Buccal aspect of the mandibular first permanent molar
What age does buccal bifurcation cyst usually occur in?
-children around 10
How many cases of buccal bifurcation cyst are bilateral?
1/2
What is the avg size of a buccal bifurcation cyst?
1.5 mm
The root apices in a buccal bifurcation cyst are tipped in what direction?
-Lingual mandibular cortex
T/F Carcinoma arising within bone is rare and essentially limited to the jaws
True
where do most odontogenic carcinomas arise from?
-Odontogenic cysts
What are the two most common presenting symptoms of a carcinoma arising in odontogenic cysts?
-Pain and sweilling
What do odontogenic carcinomas mimic?
-Odontogenic cysts
What is the most common clinically significant odontogenic tumor?
-Ameloblastoma
What is the origin of an ameloblastoma?
-Odontogenic epithelial origin
What are the three different types of ameloblastomas?
- Conventional solid or multicystic
- Unicystic
- Peripheral
What is the most common type of an ameloblastoma?
-Conventional solid or multicystic
What gender does ameloblastomas occur more commonly in?
-Equal between male and female
What age group do you see an ameloblastoma?
-30-70
Where is the most common place to find an ameloblastoma?
-Posterior mandible in the ascending ramus area
Is an ameloblastoma symptomatic or asymptomatic?
-Asymptomatic
How is the only way you can detect a small ameloblastoma?
-X-ray
If there is a clinical sign of an ameloblastoma what is it most often?
-Painless swelling
How do you describe an ameloblastoma in a radiograph?
- Soap bubble (large)
- Honeycombed (Small)
T/F Buccal and lingual cortical expansion is not seen with an ameloblastoma
False
-It is frequently present
T/F Root resoprtion is common in an ameloblastoma
True
The desmoplastic ameloblastoma does not share features with the other forms, what are its features?
- Predilection for the anterior maxilla
- Mixed radiolucent-radiopaque
What are the histopathologic features of an ameloblastoma?
- Palisading
- Hyperchromatic basal layer
- Reverse polarity
- Apical vacuolization
