odontogenic cysts part 3

Question 1

Gingival Cyst of the Newborn appear to represent an enlarged version of ____________.

from what structure do they originate?

Answer 1

numerous microcystic structures, probably from dental lamina

Question 2

Clinical presentation of gingival cysts of the newborn

Answer 2

1) Present as 1-2 mm yellow-white papules, often multiple on alveolar ridge of newborn infant
2) Usually maxillary

Question 3

what are the histological characteristics of Gingival cysts of the Newborn?

Answer 3

A) Thin, uniform stratified squamous epithelial lining

B) Cyst lumen is packed with keratin debris

Question 4

why is there no necessary treatment for Gingival Cysts of the Newborn?

Answer 4

These lesions will either self-marsupialize or involute/degenerate spontaneously

Question 5

clinical features of Epstein’s pearls:

where are they found, from what do they originate

Answer 5

occur along the median palatal raphe

arise from epithelium entrapped along the line of fusion

Question 6

clinical features of Bohn’s nodules:

where are they found, from what do they originate

Answer 6

scattered over the hard palate, often near the soft palate junction

believed to be derived from the minor salivary glands

Question 7

Gingival Cyst of the Adult are related to the __________________ cyst

Answer 7

lateral periodontal cyst

Question 8

From what structure do the Gingival Cysts of the Adult arise?

Answer 8

Arises from dental lamina rests in the gingival connective tissue (rests of Serres)

Question 9

what population groups are prone to developing Gingival Cysts of the Adult?

Where are these cysts usually found?

Answer 9

Adult, over 40 years of age

anterior segments of the jaws (canine/premolar)

No apparent sex predilection

Question 10

Clinical features of Gingival Cysts of the Adult:

Answer 10

A) Smooth-surfaced, dome-shaped elevation of the attached gingiva

B) Usually less than 1 cm in diameter

C) Tense on palpation

D) Otherwise asymptomatic

Question 11

Gingival Cysts of the Adult can mimic what other type of lesion?

Answer 11

May mimic mucocele, BUT they are found on ATTACHED gingiva

Question 12

Histological features of Gingival Cysts of the Adult:

Answer 12

a cystic cavity lined by a thin, uniform layer of cuboidal or attenuated non-keratinized stratified squamous epithelium

Question 13

what is the definition for Lateral Periodontal Cysts?

from what structure do they arise?

Answer 13

a developmental cyst occurring adjacent or lateral to the root of a tooth

probably arising from intrabony rests of dental lamina

Question 14

T/F: Teeth adjacent to a Lateral Periodontal Cyst are usually non-vital

Answer 14

FALSE

they are usually vital

Question 15

In what areas are Lateral Periodontal Cysts usually found?

what population groups are at risk for developing them?

Answer 15

A) found in mandibular premolar area, maxillary lateral incisor region

B) Peak incidence in the 5th and 6th decades

Question 16

radiographic findings for Lateral Periodontal Cysts:

Answer 16

Asymptomatic unilocular radiolucency, lateral root surface of vital tooth

Typically less than 1 cm in diameter

Question 17

Histology of Lateral Periodontal Cysts:

Answer 17

thin non-keratinized stratified squamous epithelium lining, uninflamed fibrous connective tissue

Often identical to gingival cyst of the adult

Question 18

what is the treatment/prognosis for Lateral Periodontal cysts?

Answer 18

Tx: Curettage
Prognosis: Excellent

Question 19

______________ are also known as Gorlin Cysts

Answer 19

Calcifying Odontogenic Cyst

Question 20

where are Calcifying Odontogenic cysts usually found?

In what population groups are they usually found?

Answer 20

Equal distribution between maxilla and mandible; anterior > posterior jaws

May occur at any age, with peak occurrence in second and third decade (mean age - 33 years)

Question 21

Radiographic appearance of Calcifying Odontogenic Cysts:

Answer 21

A) Usually a well-defined, unilocular radiolucency

B) Scattered radiopacities in about 50% of cases

Question 22

what % of Calcifying Odontogenic cysts are associated with impacted teeth? Odontomas?

what % are associated with root resorption?

Answer 22

A) 30% of COC’s are associated with an impacted tooth,

B) 20% with odontoma

C) resorption of adjacent tooth roots common (~ 80% of cases)

Question 23

histological characteristics of Calcifying Odontogenic Cysts:

Answer 23

most are cystic

odontogenic epithelial cells which at their periphery show a cuboidal or columnar appearance of the basal cells, similar to ameloblastoma

Solid variants are recognized

Question 24

As COC cells approach the lumen, they undergo a process termed “_______” change

Answer 24

“ghost cell”

• Cells are pale and eosinophilic, with swollen cytoplasm and loss of the nucleus

Question 25

what is the treatment/prognosis for Calcifying Odontogenic Cysts?

Answer 25

A) Treatment consists of enucleation with curettage

B) Recurrence is not common, but does occur, so follow-up is recommended

Question 26

T/F: both gingival cysts of the adult, and lateral periodontal cysts, arise from dental lamina rest cells

Answer 26

TRUE

Gingival cysts- rest cells trapped in Gingival CT

Lateral periodontal- rest cells trapped within bone (intrabony)

Question 27

Roughly ______% of calcifying odontogenic cysts are found in the gingival soft tissue

Answer 27

5-17%