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Oral Pathology > Odontogenic Cysts > Flashcards

Odontogenic Cysts Flashcards

1
Q

cyst (definition)

A

pathological cavity lines by epithelium and contains fluid

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2
Q

2 types of inflammatory cysts

A

periapical (radicular) cyst
buccal bifurcation cyst

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3
Q

inflammatory cysts happen because of

A

some inflammatory process

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4
Q

most common odontogenic cyst

A

periapical cyst

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5
Q

developmental cysts happen

A

de novo (by themselves)

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6
Q

types of developmental odontogenic cysts

A

dentigerous cyst
eruption cyst
odontogenic keratocyst
orthokeratinized odontogenic cyst
gingival cyst of newborn
gingival cyst of adult
lateral periodontal cyst
glandular odontogenic cyst

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7
Q

most common developmental cyst

A

dentigerous cyst

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8
Q

source of cells for epithelial lining in periapical cyst

A

cell lining from rests of mallassex

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9
Q

radiographic findings of periapical cyst

A

round to ovoid radiolucency
apex of non-vital tooth

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10
Q

histopathological findings of periapical cyst

A

variably thick, non-keratinized stratified squamous epithelial lining

rushton bodies
sheets of foamy histocytes
cholesterol clefts
root canal fillings material

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11
Q

treatment options for periapical cysts

A
  1. enucleation with extraction
  2. endodontic therapy (chances of recurrence are high)
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12
Q

when do residual cysts result?

A

if lesion is not removed

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13
Q

preferred location of buccal bifurcation cyst

A

buccal aspect of mandibular first permanent molar

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14
Q

predisposition to buccal bifurcation cyst

A

teeth with enamel extensions into the furcation fo rotos

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15
Q

clinical features of buccal bifurcation cyst?

A

-age 5-13
-buccal tenderness, swelling, foul-tasting discharge
-1/3rd cases bilateral

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16
Q

radiographic features of buccal bifurcation cyst

A
  1. well circumscribed lucency <2.5cm
  2. occlusal view most characteristic (lingual tilt)
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17
Q

treatment of buccal bifurcation cyst

A

enucleation
extraciton unnecessary

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18
Q

relationship with tooth for dentigerous cyst

A

forms around the crown of an impacted tooth

must have impacted teeth for diagnoses

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19
Q

where dentigerous cyst forms

A
  1. arises from reduced enamel epithelium
  2. always attached to cervical margin of impacted tooth
  3. displaces inferior dental canal
20
Q

most affected tooth by dentigerous cyst

A

mand 3rd molar region and max canine region

21
Q

how dentigerous cysts affect location of tooth

A

displace inferior dental canal

22
Q

what should you do when you find a dentigerous cyst?

A

should be submitted for histopathological confirmation

23
Q

other lesions that may arise in a dentigerous relationship of tooth

A

odontogenic keratocyst
central mucoepidermoid carcinoma
ameloblastoma

24
Q

eruption cyst

A

cyst that forms in soft tissue overlying crown of an erupting tooth

25
Q

treatment of eruption cyst

A

-cyst usually ruptures spontaneously
-tooth erupts
-if eruption is impeded, a simpel excision of the roof ot he cyst perimits speedy tooth eruption

26
Q

clinical features of odontogenic keratocyst

A

-locally aggressive cyst
-mostly mandible
-bone expansion is late feature
-multiple teeth involved
-multilocular appearance develops as lesion
-may reach large size before discovery

27
Q

histopathological features of odontogenic keratocyst

A

-uniform, thin stratified squamous epithelial lining
-palisaded appearance
-tall, columnar basal cells
-no rete pegs

28
Q

rate of recurrence of odontogenic keratocyst

A

high! (difficult to remove because of numerous satellite / daughter cysts)

29
Q

syndrome that shows presence of multiple OKCs in jaw bone

A

gorlin syndrome

30
Q

gene mutated in OKC

A

PTCH gene

31
Q

orthokeratinized odontogenic cyst VS OKC

A

epithelial lining is orthokeratinized vs parakeratinized

32
Q

gingival cyst of newborn is derived from

A

dental lamina rests

33
Q

gingival cyst of newborn

A

1-2mm whitish papules on alveolar ridge mucosa in newborns (maxilla)

34
Q

treatment of gingival cyst of newborn

A

no treatment needed

35
Q

contents of gingival cyst

A

keratin debris in lumen

36
Q

source of epithelial lining in gingival cyst of adults

A

dental lamina rests

37
Q

demographics of gingival cyst of adults

A

middle aged adults (50-60s)

38
Q

location of gingival cyst of adults

A

mandibular canine / premolar region most common

39
Q

clinical features of gingival cyst of adults

A

-painless, bluish translucent swelling
-often centered in attached gingiva
-usually less than 5mm

40
Q

intra bony counterpart of gingival cyst of adults

A

lateral periodontal cyst (sits on bone instead of soft tissue)

41
Q

botryoid odontogenic cyst

A

multilocular variant of lateral periodontal cyst

42
Q

how botryoid odontogenic cyst impacts rate of recurrence

A

teeth are preserved
slight recurrence potential

43
Q

clinical features of glandular odontogenic cyst

A

-1cm
-small cysts are asymptomatic
-large cysts are expansile (may have pain or paresthesia)
-unilocular or multilocular radiolucency

44
Q

microscopic features of glandular odontogenic cyst

A

intraepithelial microcysts filled with eosinophilic material, cilia, and mucocytes

45
Q

treatment options for glandular odontogenic cyst

A

enucleation and thorough curette (small) or en bloc resection (large)

46
Q

rate of recurrence of glandular odontogenic cyst

A

tendency to recur (up to 30%)

Oral Pathology (14 decks)

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