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Module 7 > ORAL PATH non-odontogenic cysts > Flashcards

ORAL PATH non-odontogenic cysts Flashcards

1
Q

where do non-odontogenic cysts derive from?

A

sources other than tooth-forming organ

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2
Q

list 3 non-odontogenic cysts?

A

nasopalatine duct cyst
surgical ciliated cyst
nasolabial cyst

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3
Q

clinical features of nasopalatine duct cysts?

A

uncommon
occur anywhere in the nasopalatine canal, frequently the palatal end
slow growing
swelling in middle of anterior palate
‘salty’ taste

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4
Q

where do nasopalatine duct cysts originate from?

A

nasopalatine duct in the incisive canal

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5
Q

radiographic features of nasopalatine duct cyst?

A

rounded or heart-shaped radiolucency in midline of anterior hard palate

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6
Q

what are different presentations of nasopalatine duct cysts?

A

median palatine cyst
incisive canal cyst
median alveolar cyst

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7
Q

what is the key histopathological feature of nasopalatine duct cysts?

A

neurovascular bundles in capsule

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8
Q

treatment for nasopalatine duct cysts and recurrence rate?

A

enucleation
recurrence is unlikely

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9
Q

what are clinical features of surgical ciliated cysts?

A

most located posterior mandible, following trauma/ surgery where sinus/ nasal mucosa is implanted in the jaw
may be asymptomatic or present with pain and swelling

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10
Q

what is the incidence of surgical ciliated cysts?

A

rare
F=M
50-60years old

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11
Q

histopathology of surgical ciliated cysts?

A

cyst lined with respiratory epithelium
fibrous connective tissue capsule - may be ifnlammed

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12
Q

treatment for surgical ciliated cysts and recurrence rate?

A

enucleation
recurrence is rare

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13
Q

incidence of nasolabial cysts?

A

very rare
F>M
40-50 years old

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14
Q

clinical features of nasolabial cysts?

A

arise in upper lip below nose, lateral to midline
slow growing, distorts nostril
painless unless infected
10% bilateral

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15
Q

where do nasolabial cysts derive from?

A

remnants of the embryonic nasolacrimal duct or the lower anterior portion of the mature duct

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16
Q

histopathology of nasolabial cysts?

A

cystic lesion with fibrous capsule
pseudostratified columnar epithelium lining

17
Q

treatment for nasolabial cysts?

18
Q

list the types of soft tissue cysts?

A

salivary mucocoele
epidermoid cyst
dermoid cyst
lymphoepithelial cyst
thyroglossal duct cyst

19
Q

clinical features of an epidermoid cyst?

A

painless swelling
often following trauma or surgery
more common on the skin

20
Q

key histopathological feature of epidermoid cysts?

A

no skin appendages in cyst wall

21
Q

treatment for epidermoid cysts?

22
Q

clinical features of dermoid cyst?

A

developmental lesion
various locations in head and neck
FOM common site
painless swelling in midline

23
Q

key histopathological feature of dermoid cysts?

A

skin appendage in cyst wall e.g., sebaceous gland, hair follicle

24
Q

treatment for dermoid cysts?

25
Q

clinical features of lymphoepithelial cysts?

A

developmental lesions
uncommon but do occur in oral cavity
FOM most common intraoral site
painless small swelling
yellowish in colour

26
Q

treatment for lymphoepithelial cysts?

27
Q

clinical features of thyroglossal duct cysts?

A

near the hyoid bone
midline swelling
painless
symptoms if infected

28
Q

where do thyroglossal duct cysts derive from?

A

developmental cysts that derive from embryonic thyroglossal duct

29
Q

what malignant lesion may you incidentally find when investigating a thyroglossal duct cyst?

A

thyroid carcinoma

30
Q

treatment for thyroglossal duct cysts and recurrence rate?

A

excision - ‘sistrunk procedure’ (removal of mid third of hyoid bone)
lower chance of recurrence

31
Q

what are the types of non-epithelialised primary bone cysts?

A

simple (or solitary) bone cyst
aneurysmal bone cyst

32
Q

why are non-epithelialised primary bone cysts not true cysts?

A

they are not lined by epithelium

33
Q

where do you find non-epithelialised primary bone cysts?

34
Q

clinical features of simple (solitary) bone cysts?

A

premolar/molar regions of the mandible
may be asymptomatic swelling or often incidental finding

35
Q

treatment for simple (solitary) bone cysts?

A

resolve spontaneously
resolve after opening of cavity

36
Q

clinical features of aneurysmal bone cysts?

A

very rare in the jaws - usually in mandible
painless swelling

37
Q

treatment for aneurysmal bone cysts and recurrence rate?

A

curettage
may recur

38
Q

what is stafne’s defect?

A

idiopathic bone cavity
not a true lesion
developmental anomaly
due to part of the submandibular gland indenting lingual mandible
appears cyst like on radiograph

Module 7 (72 decks)

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