odontogenic cyst and tumor Flashcards
Are cysts or tumors more common?
Cysts are relatively common, while tumors are uncommon.
What kind of lining do cysts have?
Epithelial lining.
What is the most common developmental odontogenic cyst?
Dentigerous cyst.
Where does a dentigerous cyst form?
Around the crown of unerupted teeth.
Where are dentigerous cysts most often found?
3rd mandibular molars.
What age range is most prevalent for dentigerous cysts?
Between 10-30 years old.
What does a dentigerous cyst look like on an X-ray?
Well defined, unilocular, radiolucent area associated with unerupted tooth crown.
How do you diagnose a dentigerous cyst?
Mandatory histopathologic examination.
What is an eruption cyst?
A dentigerous cyst that forms around the crown of an erupting tooth.
Where does a periapical cyst form?
At the apex of a non-vital tooth.
What is the most common cyst of the jaws?
Periapical cyst.
What is a lateral radicular cyst?
Similar to a periapical cyst.
Where do lateral radicular and periapical cysts arise from?
Rests of Malassez.
Where is a lateral radicular cyst located?
Lateral canal of a non-vital tooth.
What is a gingival cyst of the newborn?
Keratin filled cyst on alveolar mucosa of infants.
Are gingival cysts of the newborn common?
Yes.
What happens to most gingival cysts of the newborn?
Most rupture spontaneously.
What does a gingival cyst of the newborn look like?
Yellow white papule on alveolar ridge of newborn infants.
Where are gingival cysts of the newborn most often found?
Maxilla.
What is a gingival cyst of the adult?
Soft tissue counterpart of lateral periodontal cyst.
Where are gingival cysts of adults usually located?
Mandibular canine/premolar area.
What color is a gingival cyst of the adult?
Bluish or blue-gray.
What is a lateral periodontal cyst?
Developmental cyst lateral to a tooth.
Where are lateral periodontal cysts usually located?
Mandibular premolar area.
What syndrome is associated with multiple odontogenic keratocysts (OKC)?
Nevoid basal cell carcinoma syndrome (Gorlin syndrome).
What gene mutation is associated with multiple OKC?
Mutation of PTCH gene.
What skin condition is associated with multiple OKC?
Multiple basal cell carcinoma of skin.
Where are odontogenic keratocysts (OKC) often found?
Mandible.
What type of teeth is an odontogenic keratocyst (OKC) associated with?
Unerupted tooth.
Are odontogenic keratocysts (OKC) prone to recurrence?
Yes, recurrence is common.
Where are glandular odontogenic cysts most often found?
Anterior mandible.
What should glandular odontogenic cysts be differentiated from?
Central low grade mucoepidermoid carcinoma.
What is a common feature of calcifying odontogenic cysts?
Commonly cystic.
Where are calcifying odontogenic cysts usually located?
Incisor/canine region.
Where is a peripheral calcifying odontogenic cyst found?
In gingival soft tissue.
What kind of feature does a calcifying odontogenic cyst have?
Central calcification.
What kind of cells are present in a calcifying odontogenic cyst?
Ghost cells.
What is the most common odontogenic tumor?
Odontoma.
What kind of lesion is an odontoma considered?
Hamartoma.
What does a compound odontoma consist of?
Toothlets.
What does a complex odontoma consist of?
Disorganized mass of dentin/enamel.
What is the most common clinically significant odontogenic tumor?
Ameloblastoma.
How does an ameloblastoma grow?
Slow growing, locally invasive tumor.
Where are ameloblastomas most often found?
Mandible.
What effects does an ameloblastoma have on bone?
Expansion of bone.
What dental feature is associated with ameloblastomas?
Associated with unerupted teeth.
What histologic feature is associated with ameloblastomas?
Piano key histology.
Where are adenomatoid odontogenic tumors most frequently found?
Anterior maxilla.
What effect do adenomatoid odontogenic tumors have on roots?
Splaying of roots.
How does an adenomatoid odontogenic tumor extend in relation to the CEJ?
Extends apically beyond CEJ, unlike a dentigerous cyst.
What is the appearance of odontogenic myxoma?
Soap bubble appearance.
What kind of neoplasm is an ameloblastic fibroma?
Benign mixed odontogenic neoplasm.
