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Oral Pathology > CYSTS > Flashcards

CYSTS Flashcards

1
Q

Cyst?

A

Epithelial lining
Fluid filled cavity
Fibrovascular connective tissue capsule

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2
Q

Management of cysts

A

Enucleation
Enucleation with curettage
Marsupialization followed by enucleation and curettage

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3
Q

Classify cyst

A

Odontogenic
Non odontogenic
Pseudocysts

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4
Q

Nasolabial cyst also known as

A

Nasoalveolar cyst

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5
Q

Nasolabial cyst features

A

Developmental cyst
Soft tissue cyst

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6
Q

Pathology of nasolabial cyst

A

Arises from remnants of cells that form the nasolacrimal ducts or fusion of maxillary medial nasal and lateral nasal processes

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7
Q

Clinical presentation of nasolabial cyst

A

Swelling in the upper lip lateral to the midline
Elevation of ala of the nose
Recurrence is rare

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8
Q

Nasopalatine duct cyst also known as

A

Incisive canal cyst

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9
Q

Most frequent type of non odontogenic cyst

A

Nasopalatine duct cyst
Also known as incisive canal cyst

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10
Q

Pathology of nasopalatine duct cyst

A

Arises from epithelial rest cells from the remnants of nasopalatine duct

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11
Q

Location of nasopalatine duct cyst

A

Within the nasopalatine duct
Or right outside the orifice of the canal - palatine papilla

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12
Q

Clinical presentation of nasopalatine duct cyst

A

Swelling in the anterior palate accompanied by pain and drainage

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13
Q

Radiographic presentation of nasopalatine duct cyst

A

Heart shaped or inverted pear shape
Well circumscribed radiolucency at the midline between and apical to central incisors

May result in root divergence
Teeth are VITAL

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14
Q

Another name for nasopalatine duct cyst

A

Median anterior maxiallary cyst

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15
Q

How can we differentiate between incisive foramen and naospalatine duct cyst

A

Less than 6mm - incisive foramen
6mm or more - nasopalatine duct cyst

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16
Q

Pathology of median palatine cysts

A

Developed during to entrapped epithelium at the line of fusion between lateral palatal shelves

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17
Q

Clinical presentation of mediam palatine cysts

A

Fluctuant swelling
Posteriot to palatine papilla on the midline of the hard palate
Asymptomatic

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18
Q

Radiographic presentation of median palatine cysts

A

Well circumscribed radiolucency in the midline of hard palate on occlusal xray

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19
Q

Palatal cysts of newborn types

A

Epstein pearls
Bohns nodules

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20
Q

Pathology of palatal cysts of the newborn

A

Fissural/ developmental cysts

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21
Q

Difference between epsteins pearls and bohns nodules

A

Epstein pearls - small 1-3 mm yellowish papules on the median palatal raphe

Bohns nodules - small papules scattered over hard palate often near soft palate junction

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22
Q

Most common development cysts of the neck?

A

Thyroglossal duct cyst

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23
Q

Clinical presentation of thyroglossal duct cyst

A

Asymptomatic
Fluctuant
Movable swelling

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24
Q

Brachial cleft cyst also known as

A

Cervical lymphoepithelial cysts

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25
Q

Pathology of brachial cyst

A

Arises frim remnants of the brachial arched - 2nd arch most commonly

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26
Q

Why is it important to do fine needle aspiration of branchial cleft cyst?

A

To rule out malignancy
Metastatic SCC may present as lateral neck mass

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27
Q

Intraoral counter part of the brachial cyst?

A

Oral lymphoepithelial cyst
Small in size
Develops within the lymphoid tissue IO

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28
Q

Clinical presentation of oral lymphoepithelial cyst

A

Paineless
White yellowish
Small less than 1cm in diameter
Firm or soft submucusal swelling
Usually seen on floor of the mouth
Ventral tongue
Post lateral tongue
Palatine tonsil
Soft palate

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29
Q

Developmental cyst arises from embryological epithelial remnants

A

Dermoid cyst

30
Q

Dermoid cyst histology?

A

Cyst lined by epidermic like epithelium
Contains dermal structures such as sebaceous glands
Hair follicles
Sweat glands

31
Q

What is teratoma?

A

Tissue composed of more than one germ layer and sometimes all 3 ectoderm mesoderm endoderm

32
Q

Clinical presentation of dermoid cyst

A

Midline floor of the mouth
Painless slow growing swelling
Soft and doughy

33
Q

Most common odontogenic cyst

A

Radicular cyst

34
Q

Most common developmental cyst

A

Dentigerous cyst

35
Q

Dentigerous cysts also known as

A

Follicular cyst

36
Q

Dentigerous cyst arises from?

A

Separation of the follicule from the crown of unerupted tooth by accumulation of fluid between reduced enamel epithelium and tooth crown

37
Q

Features of dentigerous cysts

A

2nd 3rd decades
Associated with impacted 3rd molars followed by max canines
Max 3rd molars
And mand 2nd premolars
ALWAYS ATTACHED TO THE CEJ

38
Q

Radio features of dentigerous cysts

A

Unilocular radiolucency
Well circumscribed radiolucent area
Crown of an unerupted tooth
Displacement of the involved tooth and adjacent teeth

39
Q

Presentation of dentigerous cyst in maxillary sinus

A

Affects max 3rd molars
Circular or oval radiopacity
Well defined thin corticated borders (radiopaque lining around the cyst)

40
Q

Difference between dentigerous cyst in maxillary sinus and antral pseudocyst

A

Dentigerous cyst - corticated borders
Antral pseudocyst - no corticated borders

41
Q

Complications of dentigerous cyst

A

If left untreated- AMELOBLASTOMA

42
Q

Differentiation between dentigerous cyst and normal dental follicle

A

Less than 5mm - tooth follicle
More than 5mm - dentigerous cyst

43
Q

Soft tissue variant of dentigerous cyst

A

Eruption cyst

44
Q

Features of eruptioncyst

A

Mainly in primary dentition
Deciduous mand central Incisor
First perm molars
Dec max incisors

45
Q

Clinical presentation of eruption cyst

A

Smooth surface
Reddish pink or bluish fluctuant localised swelling on the alveolar ridge over the crown of an erupting tooth

46
Q

Features of Lateral periodontal cyst

A

Developmental odontogenic cyst
Arises from rests cells if dental lamina
Found along the lateral surface of the root of the tooth
Mandibular canine premolar area

47
Q

Botryoid odontogenic cyst

A

Term used for lateral periodontial cyst when it has a multilocular presentation

48
Q

Radio features of lateral perio cyst

A

Well circumscribed unilocular
Teardrop shape
Located laterally
Between canine and premolar in mandible
Teeth are VITAL

49
Q

Soft tissue counterpart of lateral periodontal cyst?

A

Gingival cyst of adulthood

50
Q

Gingival cyst of the newborn

A

Multiple white nodules along the MAXILLARY alveloar ridge if neonates filled with keratin and sometimes
Near the soft palate junction

Remnants of dental lamina

51
Q

Cysts arising from developing tooth bud before enamel and dentine formation, resulting in missing tooth from the dental arch

A

Primordial cyst
Cystic degeneration in stellate reticulum layer

52
Q

Diff between primordial cyst and residual cyst

A

Primordial - during formation of tooth bud
Residual - cyst arising at the site of extraction

53
Q

Keratocystuc odontogenic tumor also known as

A

OKC

54
Q

Features of OKC

A

High recurrence rate - 10-30%
Ages 10-40
Males
Arises from rests of dental lamina
Posterior mandible
Body and ramus area
Grows anterior posterior
Unilocular/multilocular

55
Q

Radio features of OKC

A

Multilocular or unilocular
May resemble dentigerous cyst
Histodifferentiation is imp to rule out

56
Q

Histo features of OKC

A

Uniformly thin epi lining
Palisaded pattern with hyperchromatic nuclie of the basal layer
Para keratinized epi layer produce wavy or corrugated pattern
Para is more aggressive than orthokeratinized

57
Q

Lesions found in children with multiple OKC, basal cell carcinoma, calicified falx cerebri, palmar plantar pits, enlarged head, rib anomalies , mild hypertelorism

A

NEAVOID BASAL CELL CARCINOMA
OR gorlin goltz SYNdrome

58
Q

Carnoys solution?

A

Used to kill the residual cells of OKC to prevent recurrence
60% ethanol
30% chloroform
10% acetic acid
1 gm of ferric chloride

59
Q

Calcifying odontogenic cyst also known as

A

Calcifying cystic odontogenic tumor gorlin cyst

60
Q

Features of calcifying odontogenic cyst

A

Odontogenic epithelial remnants
Incisor canine area - impacted canine
Ghost cells - enlarged eosinophillic epi cells without nuclei - radioopaque on xray

61
Q

Radio features of califying odontogenic cyst

A

Unilocular or multilocular radiolucency well demarcated margins

62
Q

Radicular cyst also known as

A

Periapical cyst

63
Q

Features of radicular cyst

A

Most common odontogenic cyst
Arising from preexisting periapical granuloma at the apex of nonvital tooth
Rest cells of malassez

64
Q

Difference between periapical granuloma and granulation tissues

A

Periapical granuloma - inflamed granulation tissues surrounded by fibrous CT wall

Granulation tissue- fibroblasts cappillaries and ch inflammatory cells

65
Q

Features of radicular cyst

A

Asymptomatic
Root resorption
Mobility
Doesn’t not respond to thermal and EPT

66
Q

Rushton bodies and cholesteol clefts are seen in

A

Radicular cyst

67
Q

Other names of buccal bifurcation cyst

A

Mandibular infected buccal cyst
Paradental cyst

68
Q

Features of buccal bifurcation cyst

A

Painful swelling
Buccal to the furcation of mandibular first molar
Followed by mandibular second molar
Sometimes present bilaterally
Tooth is vital
DEEP PERIO POCKET
can result from cervical enamel extension

69
Q

Well defined unilocular radiolucency involcing buccal bifurcation and root area
Tipped tooth crown buccaly and root lingually seen on the occlusal xray

A

BUCCAL BIFURCATION CYST

70
Q

Simple bone cyst also called

A

Traumatic bone cyst
Soltary bone cyst

71
Q

Features of traumatic or solitary bone cyst

A

Asymptomatic intraossues empty cavity
Lined by CT not epi
Young patients
In mandible between canine and ramys
Teeth are vital
Xray - INTERRADICULAR SCALLOPING

72
Q

Asymptomatic radiolucency in mandible due to invagination of the lingual surface of jaw posteriorly below mand canal

A

Stafne bone cyst

Oral Pathology (16 decks)

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