Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Oral Pathology Exam 3 > 5. Non-Odontogenic Cysts > Flashcards

5. Non-Odontogenic Cysts Flashcards

(42 cards)

Start Studying
1
Q

What is the presentation and location of the Torus Mandibularis?

A
  • Usually bilateral, but can be unilateral in 10%
  • Pearl-like projections of the lingual body of the mandible in the premolar area
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the Radiographic appearance of the Stafne Bone Cyst? (4)

A
  • Well defined circular/oval RL of posterior mandible near angle, BELOW mandibular canal, hyperostotic border
  • Can be superimposed on canal depending on angulation of beam
  • May be RL but NOT a true cyst
  • Not going to be in a place where most odontogenic neoplasms or cyst are, so it is not going to mimic any of them = Almost Radiographically Diagnostic
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the pathogenesis of the Median Palatal Cyst?

A

Fissural cyst developing from residual epithelial rests trapped between the palatal sutures/shelves that fuse during embryogenesis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What appears as a RL dead center in the mandible?

A
  • Median Mandibular Cyst
  • Most MMC’s represent Large Periapical Cysts or OKC’s
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Differential Diagnosis (5)

Solid lesion presenting as a RL in the globulomaxillary area

A
  • Adenomatoid Odontogenic Tumor (AOT)
    • Anterior maxilla, never past PM
    • Young persons
  • Central Giant Cell Granuloma
  • Desmoplastic Ameloblastoma
    • Only Ameloblastoma that loves this area, but not purely RL
  • Ameloblastic Fibroma
    • Can occur there but uncommon in anterior jaws
  • Odontogenic Myxoma
    • Can occur in any tooth-bearing area, but prefers posterior mandible
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

How does the Torus Palatinus appear on a radiograph?

A

Shows up as a RL 2x, not in the midline - artifact

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is the radiographic appearance of the Median Palatal Cyst?

A

Well demarcated midline palatal RL, but posterior to incisal canal area​

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What population does the Torus Palatinus affect?

A

25% of the population

  • Female 2:1
  • Asians/Eskimos
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the pathogenesis of Buccal Exostoses?

A

May be reactive to trauma from occlusion - bruxism pts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the Treatment for the Stafne Bone Cyst?

A

Observe Only

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What was the theory on the etiology of the Median Mandibular Cyst?

A
  • In theory, a cyst of the symphysis arising from entrapped epithelium during embryonic fusion
  • In reality, no fusion takes place & there is no opportunity for epithelial entrapment because fusion occurs so deeply in mesenchyme, that the epithelium is destroyed so you don’t have epithelial rests
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the clinical appearance of the Nasopalatine Duct Cyst? (4)

A
  • Most asymptomatic
  • Some expansile, painfull
  • Drainage out of papilla, can cause salty taste
  • Can show a bulge on the palatal or labial side
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

How does the Traumatic Bone Cyst present?

A
  • Hollow cavity in the mandible, also seen in the femur and tibia
  • Asymptomatic, occasionally painless swelling
  • Teeth are vital
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the radiographic appearance of the Globulomaxillary Cyst (not real)?

A
  • Inverted pear-shaped RL in between the maxillary lateral & canine that diverges both roots
  • Globulomaxillary area = between maxillary lateral & canine
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the most common non-odontogenic cyst?

A

Nasopalatine Duct Cyst

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

In what age group does the Median Palatal Cyst occur?

A

2nd decade

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Differential Diagnosis (2)

Cystic lesion presenting as a RL in the globulomaxillary area

Study These Flashcards
A
  • Odontogenic Keratocyst (OKC)
    • Can occur anywhere that teeth are forming
  • Lateral Periodontal Cyst
    • 2nd best area is maxillary
18
Q

What is the etiology of the Traumatic Bone Cyst?

Study These Flashcards
A
  • Not a true cyst - not lined by epithelium
  • Trauma not a proven etiology
19
Q

What is the Cyst of the Incisve Papilla? (4)

Study These Flashcards
A
  • A soft tissue variant of the Incisive Canal Cyst
  • The nerves & blood vessels come out of the incisive canal into soft tissue, into the anterior palate, right in the area of the incisve papilla
  • Presents as a painless soft swelling right in the midline of the incisive papilla
  • No bone involvement
20
Q

What is the treatment and prognosis for the Nasopalatine Duct Cyst? (3)

Study These Flashcards
A
  • Enucleation/curettage
  • Recurrence not expected
  • Associated teeth vital
21
Q

What are most reported Globulomaxillary Cysts due to/show?

Study These Flashcards
A

Problem with the lateral incisor

  • Miss this diagnosis because it normally is centered over the apex of the tooth, but due to the anatomy of the maxillary lateral incisor root, which diverges distopalatally in 70%
    • Cyst follows path of least resistance, and the sloped floor of nose will push the cyst distally
    • Then the cyst encounters the longer root of the canine & is diverted
  • Maxillary lateral incisor is also most likely to get dens en dente, which is bilateral in 10%
22
Q

What is the clinical presentation of Buccal Exostoses?

Study These Flashcards
A
  • Buccal or palatal shelves of bone that look like bumps on the ginigiva
  • Usually bilateral, can be unilateral
23
Q

What is the differential diagnosis for the Median Canal Cyst? (2)

Study These Flashcards
A
  • Tori are RO and bony hard, non-compressible
  • Salivary gland tumors are not midline
24
Q

What is the radiographic appearance of the Torus Mandibularis?

Study These Flashcards
A

PANX projects it over the incisors

25
What is the pathogenesis of the Stafne Bone Cyst?
**Developmental Defect** * _Extension of submandibular gland tissue_ becomes hyperplastic, & starts to grow, _pressing on the lingual cortex_ of the mandible _creating an indentation_ * Eventually causes _resorption of lingual cortex_, pushing it’s way into the cortex, * It is not internal, inside the mandible, but it causes an _indentation that shows up as an RL_
26
What is the behavior of the Torus Palatinus?
**Begins growth ~ puberty** and **slowly enlarges**, then stops growing
27
What is the radiographic appearance of the Traumatic Bone Cyst? (5)
* **Purely RL** * _Upper Border_ - **scalloped between roots** * _Lower Border_ - **smooth/flat** & **ABOVE mandibular canal** * Can occur in anterior or posterior mandible * Doesn’t like to be in 3rd molar area but can be
28
Where are Nasopalatine Duct Cysts located?
Must be **_Midline_ Anterior Palate**
29
What is the diagnostic radiography of the Nasopalatine Duct Cyst?
* Classically a **heart shaped RL**, **\> 6mm**, **between the roots of 8 and 9** * RL with no RO, with a hyper-ostotic corticated border
30
What is the clinical presentation of the Median Palatal Cyst?
* MUST be a **midline palatal swelling**, usually **compressible (soft)** and **big \>2 cm** * Occur _further back_ on the hard palate than the *incisive canal cyst*
31
What population can be affected with Stafne Bone Cysts?
90% **Males \> 40 yrs**
32
What are the rules for a normal incisive canal? (4)
* **3-6 mm,** but can reach _1 cm_ on occasion * Any **asymptomatic Rl \< 6 mm** is considered **WNL** * Any **RL \> 1 cm** is considered a **cyst**, and is **treated**, symptomatic or not * **6-10 mm RL** is **suspect** and **observed** and _treated if:_ swollen or symptomatic, draining fluids, bad taste
33
What is the location of the Torus Palatinus?
**Midline palate**, in the area of the _palatal raphe_
34
What are the ONLY 2 situations in which a Traumatic Bone Cyst can occur?
1. **Males** (60%), **10 - 20 yr old** 2. Associated wtih **Florrid Osseous Dysplasia** * ​Black females \> 40 yrs * *TBC won't occur in adults without FOD*
35
What population do Nasopalatine Duct Cysts affect?
Males \> 40 years
36
What is the pathogenesis of the Nasopalatine Duct Cyst?
**Developmental Cyst** derived from **residual epithelium** within the nasopalatine duct
37
What population does Torus Mandibularis affect?
* **8%** of the population * *Much less common than Torus Palatinus* * More in **Asians/Eskimos**
38
What was theorized etiology of the Globulomaxillary Cyst? (3)
* In theory a, **fissural cyst** from **entrapped epithelium** between **fusing _median nasal and maxillary processes_** * Proved that there are **no processes that fuse**, they are just **bumps that smooth out**, thus no opportunity for epithelial entrappment * Always due to **pathology of the teeth**, usually within the **lateral incisor**, sometime the canine
39
What is the single most common cyst that mimics the Globulomaxillary Cyst?
**Periapical Cyst** of the **Lateral Incisor** ## Footnote ​
40
What is the Histology of the Nasopalatine Duct Cyst?
* Lining of the Cyst is Not Diagnostic * Stratified squamous non-keratinizing * Pseudostratified columnar respiratory with goblet cells * Simple cuboidal or columnar * _Cyst wall = diagnostic:_ * **Large nerves, thick blood vessels & salivary gland tissue** * All normal contents of the incisive canal * Can see hyaline cartilage, due to natural cartilage in the area of biopsy
41
What is the location of the Stafne Bone Cyst?
* **_Below_ the mandibular canal** in the posterior area near the **angle of the mandible**, not near teeth * *This isn't where you find most odontogenic neoplasms or cysts = not in the differential*
42
What is the treatment and prognosis for the Traumatic Bone Cyst? (3)
* **Spontaneously resolve** * Exploratory surgery _following safe aspiration may speed this_ up by causing a clot to form which quickens healing * **Do not recur**

Oral Pathology Exam 3 (8 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions