Odontogenic Tumors and Cysts Flashcards
In Tjepkema JVD 2020, what is the most common location for conventional ameloblastoma? A) Caudal MX B) Rostral MX C) Caudal MN D) Rostral MN
Found mostly in region of canines and premolars of the maxilla - B
In Tjepkema JVD 2020, the percentage of intraosseous lesions of conventional ameloblastoma was \_\_\_, compared to \_\_\_ were extraosseous in CAA? A) 67%, 95% B) 33%, 67% C) 95%, 67% D) 95%, 33%
C)
CAA mostly extraosseous and most intraosseous are cystic.
Lower recurrence with conservative margins, margins of 1cm may not be necessary
In Fiani, odontogenic tumors and FFH, what were the most common lesions? A) FFH B) CAA C) POF D) APOT
B) CAA 45%>POF 31%>FFH 16%>APOT
In Fiani, odontogenic tumors and FFH, CAA was most common in the \_\_\_ and POF/FFH were most common in the \_\_\_? BONUS if you can state the ratio A) Rostral MX, Caudal MN B) Rostral MN, Caudal MX C) Rostral MX, Rostral MN D) Rostral MN, Rostral MX
D) CAA rostral MN (2.3:1)
POF/FFH rostral MX - POF (1.7:1)
According to Fiani, odontogenic tumors and FFH, which of the following is false?
A) Goldens, Akitas, Cockers and Shelties over-rep CAA
B) CAA equal between males and females.
C) FFH more common in mix breeds
D) APOT more common in the rostral MX
D) APOT in rostral MN
Neutered males over-rep in POF
Comparing Bellei and Babbitt, what are the percentage of DTC in their respective studies? A) 29%, 44% B) 39%, 77% C) 44%, 29% D) 77%, 39%
C) 44% Bellei, 29% Babbitt
Comparing Bellei and Babbitt, what are the percentage of unerupted teeth were PM1 in their respective studies? A) 78%, 68% B) 90%, 71% C) 68%, 78% D) 71%, 90%
A) Bellei 78% were PM1, 48.8% were cystic
Babbitt 68% were PM1, 29.4% were cystic
In Bellei, of the 10 teeth submitted for histo that were negative or equivocal for cystic lesions on rads, which of the following are true?
A) 4 lesions had pericoronal radiolucency that was <3x the width of the PDL and were DTC on histo.
B) 3 lesions had pericoronal radiolucency that was 3x the width of the PDL and were DTC on histo.
C) 3 lesions had pericoronal radiolucency that was <3x the width of the PDL and were not DTC on histo
D) All of the above.
D)
The point is that Babbitt said if the pericoronal lucency was greater than or equal to 3x the PDL you should extract because its likely a cyst. Bellei is saying they have several that are less than 3x that are still cystic so they are debunking this statement.
According to Babbitt, what breeds are over-represented in unerupted teeth?
Brachycephalics over-represented, Boxers, Bostons, Shih Tzu and Pug most common.
Bellei was Boxer and Lab
According to Babbitt, what was the percentage of histo diagnosed DTC's that were present in the 4 most common breeds? A) 85% B) 65% C) 45% D) 25%
A) 85% present in Boxers, Bostons, Shih Tzus and Pugs.
In Velasquez-Urgel, Maxillary and Mandibular POF in a cat, which of the following is false?
A) Odontogenic tumors represent 0.33% of oral tumors of the cat in one study, POF represented 7.8% of all oral tumors in another study,
B)Proliferative PDL stroma found as sole component in 16% of POF, while other POF contain odontogenic epithelium and/or foci of dentinoid, cementum or osteoid material
C) APOT originates with odontogenic epithelium with extracellular amyloid.
D) FIOT originates within the supportive CT with fibroblasts CT associated with islands of odontogenic epithelium and is noted most commonly in the rostral mandible.
D) FIOT, rostral maxilla
In Hodesson, features of squamous odontogenic tumor (SOT), which of the following were part of the defining features of the lesion? A) Lack of differentiated ameloblasts B) Squamous cell morphology C) Lack of signs of malignancy D) All of the above
D) is the answer
Lack of differentiated ameloblasts and signs of malignancy differentiate the lesion from ameloblastoma and SCC.
This case rostral mandible
According to Malmberg, AA with atypical foci in 5 dogs, which of the following is true?
A) Ancillary treatment was advocated
B) The atypical foci were associated with metaplasia and poorer prognosis relative to AA
C) No age, breed or sex predilection
D) Atypical cells were pleiomorphic with low mitotic rate.
C is true
No ancillary treatment was performed
The atypical foci were NOT associated with metaplasia or poorer prognosis relative to AA
Atypical cells had a high mitotic rate
According to Goldschmidt, clinical characterization of CAA in 263 dogs, which of the following is false?
A) CAA is typically found in middle aged-to geriatric dogs and Goldens have an increased propensity.
B) No difference noted between male and female patients
C) When narrown dirty margins encountered, revision surgery is warranted.
D) Intra-op margins of 1cm may be acceptable and margins for prevention of local recurrence may be as small as 5mm.
C) is false, when dirty margins are encountered, medical surveillance rather than revision surgery or radiation therapy may be clinically appropriate.
According to Goldschmidt, clinical characterization of CAA in 263 dogs, what was the most common location of CAA and what was its prevalence? A) Rostral MX, 21.5% B) Cadual MN, 21.5% C) Rostral MN 51% D) Caudal MX 51%
C) Rostral MN 51%
According to Tjepkema, suspected LPC in concurrently with CAA in a 2yo Std Poodle, which of the following is false?
A) LPCs are inflammatory cysts
B) LPCs are non-keratinized and associated with vital teeth.
C) Anatomically both LPC and CAA arise in the gingiva and periodontium expanding (LPC) or invading (CAA) along the affected tooth root while sparing the apex
D) LPCs present as a unilocular lucency with well defined corticated borders.
A) is False
LPCs are non-inflammatory, non-keratinized, developmental cysts that are associated with vital teeth lateral to a tooth root with absence of pulpitis, typically tear dropped shape
C) Describes possible association between LPC and CAA which may explain their existing together.
