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OMPR Compiled Exam Study Guide
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OMPR Compiled ExamStudy Guide
List (5) Epithelial Odontogenic Tumors - Answer - Ameloblastoma (also Peripheral
Variant)
- Calcifying Odontogenic Cyst/CCOT
- Adenomatoid Odontogenic Tumor (AOT)
- Calcifying Epithelial Odontogenic Tumor
- Odontogenic Keratocyst/KCOT (discussed in cyst lecture)
List (3) Mesenchymal Odontogenic Tumors - Answer Odontogenic Fibroma & Myxoma
Cemento-Ossifying Fibroma (also Peripheral Variant)
Cementoblastoma
Central Odontogenic Fibroma treatment - Answer enucleation with curettage or excision
usually does not occur
List (2) Mixed Epithelial and Mesenchymal Odontogenic Tumors - Answer Ameloblastic
Fibroma
Odontoma
Ameloblastoma, a (fast/slow) growing epithelial odontogenic tumor. It is
(malignant/benign), and locally aggressive - Answer slow growing
benign
locally aggressive
(low transformation rate)
Ameloblastoma, an epithelial odontogenic tumor occurs mostly in (mandible/maxilla)
and its usual clinical presentation is (symptomatic/asymptomatic) swelling of the
affected bone. It has (high/low) recurrence - Answer 80% in mandible (mostly in molar
ramus area) w/ asymptomatic swelling of the affected bone. With high recurrence
but note, can occur anywhere
Which of the following epithelial odontogenic tumor presents with subnuclear
vacuolization histologically - Answer Ameloblastoma.
,Ameloblastoma, an epithelial odontogenic tumor common follicular type - Answer no
capsule!
- islands with ameloblast-like epithelial cells surrounding areas resembling stellate
reticulum
note: other forms: plexiform, granulated cell, desmoplastic, acanthomatous
If patient presents with Ameloblastoma, an epithelial odontogenic tumor what is the
treatment - Answer 1st: radiograph & refer to OS for incisional biopsy
Resection with 1cm margins is best tx
Approx 15% recurrence rate
rare cases of ameloblastic carcinomas
Common radiographic appearance:
Ameloblastoma, an epithelial odontogenic tumor - Answer usually well defined RL
Smaller tumors are unilocular
Larger tumors are multilocular
Calcifying Odontogenic Cyst, an epithelial odontogenic tumor is usually
(unilocular/multilocular) and often affects what population - Answer usually unilocular,
but may be multilocular
age range - children to adults
T/F The lining of a dentigerous cyst can give rise to OKC or ameloblastoma - Answer
TRUE! Thats why you remove all the tissue.
Calcifying Odontogenic Cyst, an epithelial odontogenic tumor affects mandible or
maxilla more - Answer mandible = maxilla (anterior jaws favored)
Calcifying Odontogenic Cyst, an epithelial odontogenic tumor, is often associated with -
Answer calcifications or unerupted teeth, or odontomas
Calcifying Odontogenic Cyst, an epithelial odontogenic tumor, is usually (multi/uni)
locular. And affects the (anterior/posterior) (mandible/maxilla)more - Answer usually
unilocular, but may be multilocular
maxilla=mandible, anterior jaws favored
(note: associated w/ calcifications or unerupted teeth or odontomas)
T/F a Calcifying Odontogenic Cyst occurs anywhere and can cause bony hard
buccal/palatal swelling? - Answer true! but mostly on anterior maxilla
,Calcifying Odontogenic Cyst (COC) radiographic apperance - Answer most commonly
found on anterior maxilla
- well defined (mixed RL/RO) that may be associated with impacted tooth or odontoma
Characteristic dark pink "ghost" cells. Often see cyst lien, lining, wall and calcifications
- Answer (COC) Calcifying Odontogenic Cyst
Calcifying Odontogenic Cyst (COC) and AOT (Adenomatoid Odontogenic Tumor)
treatment & (high/low) recurrence - Answer - simple enucleation
- low recurrence
AOT (Adenomatoid Odontogenic Tumor) is usually (symptomatic/asymptomatic),
(benign/malignant), (encapsulated/no capsule) and occurs mostly where and what
demographic - Answer asymptomatic
benign
encapsulated
70% females <20yo
anterior jaw ; maxilla > mandible
associated with impacted/unerupted teeth usually canines
AOT (Adenomatoid Odontogenic Tumor) histologic appearance - Answer encapsulate
dust-like adenomatoid
whorls and large masses of epithelial cells
scattered calcifications within the tumor
AOT (Adenomatoid Odontogenic Tumor) radiographic appearance - Answer
well-circumscribed RL with RO within the tumor
finer than COC
Simulates a dentigerous cyst but RL extends BEYONG CEJ
often associated with impacted tooth
COC/AOT tends to have courser, bigger calcifications where as (COC/AOT) has finer,
more snowflake like clacifications. (not definitive) - Answer COC = courser
AOT = finer
(CEOT) Calcifying Epithelial Odontogenic Tumor (Pindbord Tumor) affects
(maxilla/mandible) 2x more and is most common in what location - Answer mandible 2x
more
, premolar/molar area
most associated w/ impacted teeth
(CEOT) Calcifying Epithelial Odontogenic Tumor Histology - Answer Islands and sheets
of uniform epithelial cells w/ round nuclei, Congo red
Amyloid-like deposits and calcifications in the tumor
recall: amyloid is a protein that is assoc w MM, but this has nothing to do w MM
(CEOT) Calcifying Epithelial Odontogenic Tumor radiographic appearance - Answer
unilocular or multilocular
calcifications within the tumor appear as RO within the rL
(CEOT) Calcifying Epithelial Odontogenic Tumor aka - Answer (Pindbord Tumor)
Calcifying Epithelial Odontogenic Tumor (CEOT) treatment - Answer conservative local
resection
good prognosis - less aggressive than ameloblastoma
(5) Common Benign Odontogenic Multilocular RL - Answer MACHO
Odontogenic Myxoma
Ameloblastoma
Central Giant Cell Granuloma
Central Hemangioma
Odontogenic Keratocystf
Central Odontogenic Fibroma is believed to be the counterpart of ___. Occurs mostly in
___ - Answer assoc w peripheral ossifying fibroma (in ST)
incidental but can cause cortical expansion if large
MX = MD (in maxilla tend to be anterior to first molar)
1/3 associated with *UNERUPTED TOOTH*
Central Odontogenic Fibroma is often an incidental finding but can cause cortical
expansion. It is often well circumscribed but (encapsulated/unencapsulated). What are
(2) Histologic types - Answer unencapsulated
Histo
1. Simple type
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