Odontogenic Tumors Flashcards
Ameloblastoma Adenomatoid Odontogenic Tumor Calcifying Epithelial Odontogenic Tumor Squamous Odontogenic Tumor Clear cell odontogenic tumor
These are all
Tumors of odontogenic epithelium
The most common odontogenic tummor: 20-60 yrs. no sex predilection
Mandible > Maxilla
Posterior > Anterior
Often associated with impacted 3rd molar
Resorption of adjacent tooth roots common
Multilocular/unilocular radiolucent lesion
“SOAP BUBBLE or Honeycomed appearance”
Reverse polarization seen in histology
Conventional Ameloblastoma
Younger patients: 10-20 yrs
Mandible > Maxilla
Posterior > Anterior
Small lesions - asymptomatic
Large lesions - painless expansion
Often associated with the crown of unerupted third molar
Well defined unilocular radiolucency
Unicystic Ameloblastoma
Uncommon
Wide rage, mostly middle aged
Mandible > Maxilla
Clinically presents as a nodule on the posterior gingiva or alevolar mucosa
Peripheral Ameloblastoma
Any age
Metastases to the lung, cervical lymph node
poor prognosis
Malignant ameloblastoma
Any age, more in older group
Metastases do not necessarily occur
Cytological features of malignancy
Ameloblastic carcinoma
3-7% of all odontogenic tumors
Young patients between 10-19 years
Anterior maxilla
Females>males
often involves the crown of an unerupted canine
unilocular radiolucency, may show snowflake calcifications
Adenomatoid odontogenic tumor (AOT)
Uncommon
wide age range (mostly 30-50 yrs)
mandible posterior
unilocular/multilocular radiolucency, may contain calcified structures
frequently associated with an impacted tooth
Calcifying epithelial odontogenic tumor (CEOT)
Very rare
wide age range
maxilla = mandible
females = males
Asymptomatic or clinically presents as a gingival nodule with tooth mobility
Triangular radiolucent defect lateral to roots
Squamous odontogenic Tumor (SOT)
Rare neoplasm
wide age range: most patients are older than 50 yrs
Mandible > Maxilla
Irregular unilocular or multilocular radiolucency
Neoplastic cells have “clear” morphology which resemble glycogen-rich presecretory ameloblasts
Clear Cell Odontogenic Tumor
Ameloblastic fibroma
Ameloblastic fibro-odontoma
Odontoma
Dentinogenic ghost cell tumor
These are all?
Mixed odontogenic tumors
uncommon neoplasm
younger patiens < 20 yrs
Males > females
Asymptomatic swelling of the jaws usually in posterior mandible
Well definied unilocular or multilocular radiolucency
Often associated with an uneruped tooth
Ameloblastic fibroma
Rare
Features of ameloblastic fibroma with additional enamel and dentin formation
Children, average age 10 yrs
Predilection for posterior mandible
swelling of the jaws
radiolucent lesion with calcified material within the lesion
Ameloblastic Fibro-Odontoma
Most common odontogenic tumor
composed of enamel and dentin and varying amounts of odontogenic epithelium and mesenchyme
Most patients are younger than 20
Asymptomatic/rarely expansion of jaws
Mixed lucent - opaque lesion
Odontoma
Composed of multiple small tooth like structures located in the anterior maxilla
Compound odontoma
Consists of a conglomerate mass of enamel and dentin located in the posterior jaw
Complex odontoma
Very rare
Central islands of odontogenic epithelium containing ghost cells
Dentinoid deposition
Calcifications
Dentinogenic Ghost Cell Tumor
Odontogenic Fibroma
Odontogenic Myxoma
Cementoblastoma
These are all?
Tumors mainly of odontogenic ectomesenchyme
Uncommon, wide age range, Female>Male
Can be associated with unerupted teeth
presents anywhere in the jaws
Unilocular or multilocular radiolucency
Root divergence/root resorption possible
Odontogenic Fibroma
Rare
Wide age range, mostly young adults
Mandible >Maxilla, any area of the jaw
Unilocular or multilocular radiolucnecy
Can cause resorption/displacement of teeth
Odontogenic Myxoma
Rare
children and young adults
Usually seen in mandibular posterior region
Cortical expansion, cortical erosion, displacement of adjacent teeth
Radiopaque mass fused to tooth roots and surrounded by a radiolucent rim
Cementoblastoma
