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PATH II > developmental and odontogenic cysts day 1 > Flashcards

developmental and odontogenic cysts day 1 Flashcards

1
Q

non-odontogenic cysts

A

NP duct cyst and median palatine cyst

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2
Q

CYST DEFINITION

A

Epithelial lined pathologic cavity

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3
Q

Nasopalatine Duct Cyst
* where?
* common?
* arises from?
* what type of teeth?
* demo?

A
  • Incisive Canal Cyst
  • Most common non-odontogenic cyst of oral
    cavity
  • A developmental cyst that arises from epithelial remnants of nasopalatine duct
  • Vital teeth
  • Adults - 4th to 6th Decades
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4
Q
A

NP duct cyst

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5
Q

when is there pain/drainage with NP cyst

A

when 2 infection occurs

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6
Q

Signs/Symptoms associated with
Nasopalatine Duct Cyst
upper limit for normal canal radio app

A
  • Radiolucency - 0.6 cm is the upper limit of normal for the incisive foramen
  • Swelling of anterior palate
  • Drainage and pain, if inflamed
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7
Q

what can be in the walls of a NP duct cyst

A

vessels, nn, and inflammatory cells

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8
Q

dif dx of median palatine cyst to NP duct cyst

A

MP cyst usually more posterior

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9
Q

Median Palatine Cyst
* app?
* histo
*difficult to distinguish from?

A

]* Well-circumscribed palatal lucency
* Epithelium entrapped during fusion of palatal shelves
* Stratified squamous or pseudostratified columnar, possible cilia
* May be difficult to distinguish from Nasopalatine Duct Cyst (identical histo)

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10
Q
A

median palatine cysts

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11
Q

8/9 with NP duct cyst

A

teeth are vital

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12
Q

types of odontogenic cysts

A

INFLAMMATORY CYSTS AND DEVELOPMENTAL CYSTS

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13
Q

INFLAMMATORY ODONTOGENIC CYSTS

A

Periapical Cyst
Residual Cyst
Buccal Bifurcation Cyst

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14
Q

Periapical Cyst (Radicular Cyst)
where? from what cells? radio?

A
  • Apex of non-vital tooth
  • Arises from rests of Malassez
  • well defined unilocular radiolucency
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15
Q

median vs NP cyst

A

radiographically: median palatine cyst will be more posterior
clinically: more posterior swelling on palate

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16
Q

tooth is noon vital, what could this be?

A

PA cyst, abcess, or granuloma

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17
Q

PA cyst pathophysiology

A

infection out apical foramen, infects the bone> inflamm cells causes rests of Malassez to proliferate

18
Q

can there be many PA cysts?

A

yes, multiple unilocular well defined lucencies

19
Q

what cells can be in the conn tissue walls of cysts?

A

inflammatory cells

20
Q

residual cyst

A

PA cyst left at apex of extraction site

21
Q

residual PA granuloma

A

same as cyst of gramuloma instead, no epithelial lining with granuloma

22
Q

residual PA abcess

A

same as other but would see pus/ many PMN’s

23
Q

Buccal Bifurcation Cyst

A
  • Paradental cyst
  • Buccal bifurcation of vital mandiblar molar teeth with
    cervical enamel projection
24
Q

buccal bifucation cyst radio

A

well defined luceny at molar

25
Q

Buccal Bifurcation Cyst app

A

cyst at buccal aspect of molar at bifurcation

26
Q

what can inflammation do to the cyst epithelium?

A

make it hyperplastic

27
Q

what is in the conn tissue wall of cysts?

A

inflam cells

28
Q

DEVELOPMENTAL ODONTOGENIC CYSTS

A

Dentigerous Cyst
Eruption Cyst
Dental Lamina Cyst
Odontokeratocyst
Calcifying Odontogenic Cyst
Glandular Odontogenic Cyst

29
Q

Dentigerous Cyst
* common?
* Arises from? attatched?
*what is the upper limit for follicle size before we consider this?

A
  • Most common type of developmental odontogenic cyst
  • Arises from dental follicle - attached to the cervix, enclosing the crown of an unerupted tooth that is impacted
  • Enlarged follicular space > 4 mm
30
Q

dentigerous cyst app on radio

A

well defined unilocular pericoronal lucency of impacted teeth

31
Q

hyperplastic follice/ enlarged dental follicle

A

presents the same as dentigerous cyst but different histo

32
Q

what is req for dentigerous cyst DDx?

A

impacted teeth

33
Q

describe this lesion

A

well defined unilocular pericoronal luceny

34
Q

hyperplastic dental follice histo

A

possess REE not strat sqaumous epi wall (dentigerous cyst)

35
Q

leave residual cyst in bone?

A

no, increased chance for malignancy to develop

36
Q

Unicystic Ameloblastoma from dentigerous cyst?

A

can result from dentigerous cyst lining undergoing amelogenesis
same radiographic appearence

37
Q

what could this be?

A

Unicystic Ameloblastoma
or dentigerous cyst

38
Q

how is unicystic ameloblastoma dif from dentigerous cyst

A

different histo and prognosis

39
Q

eruption cyst

A
  • tooth will erupt on its own with gingival swelling surrounding teeth
    *
40
Q

eruption cyst app?

A

gingival swelling, may be bluish or normal color

41
Q

eruption cyst histo

A

normal oral mucosa with a epithelial lining of lumen

42
Q

eruption cyst radio

A

none, soft tissue cyst would not be seen on radio

PATH II (25 decks)

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