Radiographic Interpretation > Midterm Review > Flashcards

Midterm Review Flashcards

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1
Q

Describe the radiographic findings of a dentigerous cyst:

A
  1. consistently widened follicular space of >3.0mm
  2. well-delineated radiolucency with corticated borders
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2
Q

With a dentigerous cyst, the cyst lining arises from remnants of the:

A

dental follicle

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3
Q

Accounts for 20% of jaw cysts:

A

dentigerous cyst

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4
Q

Describe age/sex/site most common for dentigerous cysts:

A
  1. highest incidence in 20s & 30s
  2. most common in mandibular 3rd molars & maxillary canines & can affect any impacted tooth
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5
Q

Describe the possible treatements for dentigeous cysts:

A
  1. enucleate
  2. degree of surgery depend on size of tumor
  3. potential for degeneration of cyst lining to an ameloblastoma or squamous cell carcinoma
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6
Q

What are potential risk for a dentigerous cyst?

A
  1. ameloblastoma
  2. squamous cell carcinoma
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7
Q
A

Dentigerous cyst

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8
Q
A

Dentigerous cyst (expansion of)

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9
Q

Presents as a soft fluid-filled swelling of crestal mucosa in area of an erupting tooth

A

Eruption cyst

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10
Q

An eruption cyst often has a ___ discoloration due to ___

A

bluish; trauma creating blood in cystic fluid

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11
Q

Radiograpahically, for an eruption cyst you may see:

A

lack of crestal alveolar bone because of position of erupting crown & cyst near crest

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12
Q

Describe age/sex/site most common for eruption cysts:

A

less than 10 years of age
-mixed dentition
-most common in mandibular molar resgion

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13
Q

Management of an eruption cyst:

A
  1. often rupture spontaneously
  2. some may require simple excision
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14
Q
A

eruption cyst

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15
Q
A

eruption cyst

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16
Q
A

eruption cyst

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17
Q

A mixed odontogenic tumor

A

ameloblastic fibroma

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18
Q

Radiographically, an ameloblsatic fibroma may be seen as:

A

pericoronal radiolucency associated with developing tooth

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19
Q

Describe age/sex/site most common for ameloblastic fibroma:

A
  1. 70% of cases are less than 20yo
  2. mean age 14-15.5 yrs
  3. highest incidence in mandibular molar to premolar region
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20
Q

Describe the management for an ameloblastic fibroma:

A
  1. enucleation
  2. 20% recurrence
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21
Q

A mixed odontogenic tumor similar to ameloblastic fibroma but has mineralized stroma:

A

amelobalstic fibroodontoma

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22
Q

What happens if mineralization is high in an ameloblatic fibroodontoma?

A

Radiopaque flecks may be evident radiographically

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23
Q

Radiopgrahically how does an ameloblatic fibroodontoma appear?

A

pericoronal radiolucency associated with developing tooth with radiopaque flecks in the lumen

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24
Q

Describe age/sex/site most common for ameloblastic fibroodontoma:

A

-mean age ~15 yrs
-posterior mandible

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25
Treatment for ameloblastic fibroodontoma:
must be differentiated from odontoameloblastoma as the latter is more aggressive
26
ameloblastic fibroma
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ameloblastic fibroma
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ameloblastic fibroma
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ameloblastic fibroma
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ameloblastic fibroma
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ameloblastic fibroma
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ameloblastic fibroodontoma
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ameloblastic fibroodontoma
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ameloblastic fibroodontoma
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ameloblastic fibroodontoma
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-rare tumor -must be differentiated from ameloblastic fibroodontoma as it is more aggressive & requires surgical resection
Odontoameloblastoma
37
Describe the radiographic appearance of odontoameloblastoma:
1. expansive with destruction of adjacent bone 2. rudimentary tooth-like stuctures similar to complex odontoma
38
Describe age/sex/site most common for odontoameloblastoma:
-teens & children -mainly in mandible
39
odontoameloblastoma
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3-7% of odontogenic tumors:
adenomatoid odontogenic tumor
41
Histologically a cross between a dentigerous cyst & ameloblastoma
adenamatoid odontogenic tumor
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Odontogenic epithelium is arranged in duct-like glandular array:
adenamatoid odontogenic tumor
43
Consistently widened follicular space of >3mm if associated with crown of impacted tooth; 75% of cases are pericoronal:
adenamatoid odontogenic tumor
44
Radiogaphically how does an adenamatoid odontogenic tumor appear?
well-delineated radiolucency with corticated border (usually > 3cm)
45
Describe age/sex/site most common for adenamatoid odontogenic tumor:
-Females to males- 2:1 -adolescents 10-19 years -anterior jaws -more common in maxilla
46
Treatment of adenamatoid odontogenic tumor:
enucleation with likely recurrence
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adenamatoid odontogenic tumor
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adenamatoid odontogenic tumor
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adenamatoid odontogenic tumor
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adenamatoid odontogenic tumor
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adenamatoid odontogenic tumor
52
Approximately 50% of Pindborg tumors occur with:
impacted teeth
53
Radiographically a pindborg tumor appears:
1. radiopaque flecks due to calcified amyloid 2. a breakdown product of the neoplastic epithelial cells (these mineralizations are called Leisegang's rings)
54
Describe age/sex/site most common for Pindborg tumors:
-Mean age of 40 years -more common mandible -posterior mandible
55
Pindborg tumors treatments:
Large lesions require En-block resections
56
Pindbord tumor =
calcifying epithelial odontogenic tumor
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Pindborg tumor
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Pindborg tumor
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Pindborg tumor
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Extremely variable presentation with approximately 2016% behaving as neoplasms:
Gorlin cyst
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gorlin cyst=
calcifying odontogetic cyst
62
Gorlin cyst size:
2cm-12cm
63
Describe age/sex/site most common for gorlin cyst:
1. any age but commonly diagnosed in teens & young adults 2. no sex predilections 3. 65% in anterior maxilla
64
Treatment for gorlins cyst:
simple enucleation with minimal recurrence
65
Gorlin cyst
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Gorlin cyst
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Gorlin cyst
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Radiographic Interpretation
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