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71 Cards in this Set

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What is the most common clinically significant odontogenic tumor?
Ameloblastoma
Common, Unicystic, or Peripheral Ameloblastoma: Average age of occurrence is 30 years old.
Common
Common, Unicystic, or Peripheral Ameloblastoma: Benign aggressive
Common
Where do 85% of Common ameloblastomas occur?
Posterior mandible
Common, Unicystic, or Peripheral Ameloblastoma: Multilocular radiolucency with small compartments
Common
How do you differentate the multilocular radiolucency of a common ameloblastoma from a cyst?
Ameloblastoma has SMALL compartments, but cysts have BIG compartments
What disease features nests of odontogenic epithelium with stellate reticulum inside a rim of columnar ameloblasts?
Common Ameloblastoma
What disease features connective tissue stroma separating epithelial nests?
Common Ameloblastoma
Common, Unicystic, or Peripheral Ameloblastoma:Not encapsulated
Common
Common, Unicystic, or Peripheral Ameloblastoma: Resection is the typical treatment
Common
If a Common ameloblastoma is curetted, what is the recurrence rate (____-____%)?
50-90%
Name a differential diagnosis for Common ameloblastoma, and why it is similar.
Simple bone cyst - Scalloped border
Common, Unicystic, or Peripheral Ameloblastoma:Benign and not locally destructive
Unicystic
Common, Unicystic, or Peripheral Ameloblastoma:Average age of occurrence is 23 years old
Unicystic
Where do 90% of unicystic ameloblastomas occur?
Posterior mandible
Common, Unicystic, or Peripheral Ameloblastoma: Unilocular radiolucency, well-circumscribed
Unicystic
What disease features a cystic cavity, lined by ameloblasts, filled with stellate reticulum?
Unicystic Ameloblastoma
Common, Unicystic, or Peripheral Ameloblastoma: Capsulated
Unicystic
Name 3 differential diagnoses for Unicystic Ameloblastoma.
1 OKC 2 Dentigerous cysts 3 Simple bone cysts
How do you differentate Unicystic Ameloblastoma from Dentigerous cysts?
Unicystic Ameloblastomas are larger on radiographs
Name 3 differential diagnoses for Peripheral Ameloblastoma.
1 Pyogenic granuloma 2 Peripheral Giant Cell Granuloma 3 Peripheral Fibroma
Does peripheral Ameloblastoma look more like a well defined Common or Unicystic Ameloblastoma?
Common
What is the age and gender predilection for Adenomatoid odontogenic tumors?
10-19 years old, females
What is the MOST common site for an Adenomatoid odontogenic tumor?
Anterior maxilla, which is VERY unusual for an odontogenic tumor
T/F: Adenomatoid odontogenic tumors never occur around teeth.
False, 75% occur around unerupted teeth
How do you differentiate Adenomatoid odontogenic tumors from Dentigerous cysts?
Adenomatoid odontogenic tumors attach somewhere other than the CEJ, and occur in kids (not adults)
What disease histologically features columnar cells in duct-like arrangement, and polyhedral cells arranged in loose sheets?
Adenomatoid odontogenic tumors
Why are Adenomatoid odontogenic tumors so easy to remove, and have rare recurrence?
Because of their thick fibrous capsules, excision is curative
What is the age predilection for Calcifying Epithelial Odontogenic Tumors/Pindborg tumors?
Adults, 30-50 (a 40+ disease)
Name the tumor that most commonly presents as a painless, slow-growing swelling.
Calcifying Epithelial Odontogenic Tumors/Pindborg tumors
Calcifying Epithelial Odontogenic Tumors/Pindborg tumors can be (radiolucent/opaque/mixed/more than one)?
Pure radioluent or mixed
If Calcifying Epithelial Odontogenic Tumors/Pindborg tumors are mixed radiolucencies, what two patterns of radioopacity are often seen?
1 Ground glass 2 Cotton wool
What disease histologically features polyhedral epithelial cells, and amyloid or amyloid-like material?
Calcifying Epithelial Odontogenic Tumors/Pindborg tumors
Calcifying Epithelial Odontogenic Tumors/Pindborg tumors are classified as (innocuous, benign, benign aggressive, malignant).
Benign
Name the exceptionally rare tumor that appears to arise from neoplastic transformation of the rests of Malassez.
Squamous odontogenic tumor
What age range can squamous odontogenic tumor occur within?
8-74 years old
Name the disease that radiographically looks like a periodontal defect, destroyig crestal bone, and occurring as a triangular lucency lateral to tooth roots.
Squamous odontogenic tumor
What disease histologically features nests of bland stratified squamous epithelium?
Squamous odontogenic tumor
What uncommon tumor has both epithelial and mesenchymal tissue that are neoplastic?
Ameloblastic fibroma
What age group is most often affected by ameloblastic fibroma?
Teens, or younger
What is the site predilection for ameloblastic fibroma?
Posterior mandible
If any child presents with a radiolucent lesion in the posterior mandible, what disease is it until proven otherwise?
Ameloblastic fibroma
What disease histologically features islands of odontogenic epithelium, and developing tooth germ, with plump fibroblasts?
Ameloblastic fibroma
How does ameloblastic fibroma histologically differ from ameloblastoma?
Epithelial islands are small,and too skinny to be filled with stellate reticulum
What is the most common type of odontogenic tumor, exceeding the prevalence of all other odontogenic tumors combined?
Odontoma
What disease features multiple, small structures with recognizable tooth morphology?
Compound odontoma
What disease features masses/globs of tissue with no anatomic resemblance to a tooth?
Complex odontoma
During what age range are odontomas usually detected?
0-20
What is the site predilection for compound odontomas?
Anterior maxilla
What is the site predilection for complex odontomas?
Posterior mandible
If you cannot tell the type of odontoma by looking at the morphology,what is a reliable indicator of type?
Site of occurrence
If an odontoma is associated with a tooth, will it be around the crown or the root?
Crown
Name the unique neoplasm that feature islands of odontogenic epithelium with amyloid protein,plus enamel and dentin structures.
Ameloblastic fibro-odontoma
What is the age predilection for ameloblastic fibro-odontoma?
Children
What is the more common pattern of odontogenic fibroma; peripheral or central?
Peripheral
Name the tumor that most commonly presents as a painless, slow-growing gingival swelling, which occurs at any age.
Peripheral odontogenic fibroma
What disease histologically featues fibrous connectiv tissue and odontogenic epithelial nests?
Peripheral odontogenic fibroma
What is gender predilection for central odontogenic fibroma?
Females, 2.2:1
What are the two most common site predilections for odontogenic fibromas?
Anterior maxilla, or posterior mandible
What disease is often associated with a palatal mucosal groove when the lesions are in the maxilla?
Central odontogenic fibroma
What is the age predilection for odontogenic myxomas?
Young adults
Name the disease that radiographically has small honeycomb loculations, and often has a delicate, wispy appearance.
Odontogenic myxoma
Why is an odontogenic myxoma hard to remove?
It is soft, mushy, and gelatinous, like an umbilical cord, and clean margins are hard to get
What disease is histologically indistinguishable from osteoblastoma?
Cementoblastoma
What is the age predilection for cementoblastomas?
Young adults, under 25
What is the single-most common site for cementoblastomas to occur?
Mandibular first molars
With cementoblastomas, are the teeth (non/vital)?
Vital *KEY
What tumor should be easily identifiable only by radiographs?
Cementoblastoma
What does a cementoblastoma look like on radiographs?
Mixed, well-defined radiolucency/opacity, with a central opaque portion that obscures the root outline of the tooth
Why might cementoblastoma be mistaken for osteoblastoma/sarcoma?
Histologically indistinguishable
How is a cementoblastoma treated?
Remove, with the entire tooth, or do root canal and do partial amputation