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Radiographic Interpretation > Multiloc Radio > Flashcards

Multiloc Radio Flashcards

1
Q

skipped
Multilocular Radiolucencies
(7)

A
  • Ameloblastoma
  • Odontogenic Keratocyst
  • Central Giant Cell Granuloma
  • Odontogenic Myxoma
  • Vascular Lesions - Hemangioma
    . A-V aneurysm
  • Familial Fibrous Dysplasia
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2
Q

Ameloblastoma
(2)

A

Benign odontogenic neoplasm; one of very few true odontogenic neoplasms
Capable of uncontrolled, unlimited
growth potential

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3
Q

Ameloblastoma
Classified into:
(2)

A
  1. Conventional (Multicystic)
    Ameloblastoma
  2. Unicystic Ameloblastoma
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4
Q

Conventional (Multicystic)
Ameloblastoma
* Account for —% of all ameloblastomas
* — histologic sub-types;

A

85 – 90
Five

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5
Q

Five histologic sub-types;

A
  • follicular - most common
  • also have plexiform, acanthomatous,
    granular, desmoplastic and basaloid
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6
Q

Ameloblastoma
Conventional
(3)

A
  • Usually slow painless swellings
  • Small lesions only detected by
    radiographs
  • Larger lesions detected clinically
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7
Q

Ameloblastoma
Conventional
Radiographic
(4)

A
  • Small lesions are
    unilocular with
    corticated borders
  • Large, aggressive
    lesions develop
    multilocular patterns
  • Displace and resorb
    teeth
  • expansive
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8
Q

Ameloblastoma
Conventional
Age
Site
Gender Predilection

A

Mainly adults – equal prevalence in 3’rd to 7’th decade
Uncommon in 2’nd decade
Rare in 1’st decade

mandible (85%); maxilla (15%)

none

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9
Q

Ameloblastoma
Management

Other

A

Large lesions are aggressive requiring bone
resection

Higher likelihood for recurrence.

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10
Q

Ameloblastoma
Management

Other

A

Block or marginal resection; ie resect >1.0cm
past radiographic limits of tumor
15% recurrence

50-90% recurrence if not resected
Rare to be malignant

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11
Q

Unicystic Ameloblastoma
(3)

A
  • arise within a cyst lining; either luminal,
    intraluminal or mural
  • less aggressive form of ameloblastoma
  • Recurrence rates of 10-20%
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12
Q

Ameloblastoma
Radiographic
(1)

A
  • expansive
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13
Q

Ameloblastoma
unicystic
Age
Site
Mandible (–%)
Maxilla (–%)

A

Mean age 23 years

90, 10

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14
Q

Odontogenic Keratocyst
Pathophysiology
(3)

A
  • 10-12% of all odontogenic cysts; 3’rd
    highest oral cyst frequency
  • aggressive cysts; behave more like
    benign neoplasms
  • thought to arise from cell rests of dental
    lamina
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15
Q

OKC
Clinical
(2)

A
  • Normally asymptomatic
  • With increasing size, pain, swelling and
    exudate may oocur
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16
Q

OKC
Radiographic
(5)

A
  • Well-defined, smooth,
    corticated borders
  • Thinning and mild
    expansion with
    occasional perforation
    of cortical plates
  • Displacement of teeth
  • *only occasional
    root resorption
    (< dentigerous and
    < radicular cysts)
  • *mild B-Li
    expansion; but
    extensive antero-
    posterior extension
17
Q

Odontogenic Keratocyst
Age
Site
Gender

A

Majority (i.e., 60%) in 2nd and 4th decade

Majority (60-80%) affect mandible posterior to the
canines

Male predilection

18
Q

Odontogenic Keratocyst
Management
Other

A

Enucleation with curettage

  • High recurrence rate; some rates
    reported @ 47 and 62% (probably
    parakeratinized variants)
19
Q

Odontogenic Keratocyst
Other
* When multiple OKCs are found they
may constitute part of the

A

basal cell
nevus syndrome (a.k.a. nevoid basal
cell carcinoma syndrome)

20
Q

Nevoid basal cell carcinoma syndrome
(6)

A
  • multiple basal CA’s of skin
  • Palmar and plantar pitting (60%)
  • > 1 OKC (KOT) of jaws (75%)
  • Bifid or splayed ribs (60-75%)
  • Kyphoscoliosis (50%)
  • Skull anomalies:
21
Q

Skull anomalies:
(4)

A
  • frontal and parietal bossing
  • hypertelorism
  • intracranial calcifications;
  • majority are of falx cerebri
22
Q

Central Giant Cell
Granuloma
Clinical
(2)

A
  • Asymptomatic swelling
  • Can be aggressive
23
Q

Central Giant Cell
Granuloma
Radiographic
(4)

A
  • Well-defined
    borders
  • Can be multilocular
  • Thinning and
    expansion of cortical
    plates
  • Displacement of
    teeth and occasional
    root resorption
24
Q

Central Giant Cell
Granuloma
Age
Site
Gender

A

Usually < 30 years (60%)

mandible (70%) & frequently between the
molars

Female > male (2:1)

25
Q

Central Giant Cell
Granuloma
Management
Other

A

Enucleation with aggressive curretage

  • Lesion is histologically similar to the Brown
    tumor of primary hyperparathyroidism
26
Q

Central Giant Cell
Granuloma
Other

A
  • Patients with the CGCG should be evaluated to
    rule out hyperparathyroidism
27
Q

Screening test in the appropriate blood studies:
– serum calcium
– alkaline phosphatase
– serum phosphorus

A

increase
increase
decrease

28
Q

Odontogenic Myxoma
Clinical
(2)

A
  • Primarily a lesion of alveolar bone
  • Basically a fibrous lesion
29
Q

Odontogenic Myxoma
Radiographic

A

Scalloped and
multilocular

30
Q

Odontogenic Myxoma
Age
Site

A

Young to adults (25 – 30 years)

Greater prevalence in mandible

31
Q

Odontogenic Myxoma
Management
Other

A

Excision

Recurrence up to 25% because the lesions are
not encapsulated.

32
Q

Central Hemangioma
Clinical
* — are next most common site after skull and
vertebrae
* Firm, slow-growing — expansion
* Overlying mucosa is more
* Spontaneous
* — on diascopy and — sensation may be
detected
* Many require — to assist diagnosis

A

Jaws
asymmetric
erythematous and warm to touch
gingival bleeding
Bruit, pulsatile
needle aspiration

33
Q

Central Hemangioma
Radiographic
(2)

A
  • Variable pattern
    ranging from cyst-
    like radiolucencies
  • May have
    multilocular “soap-
    bubble” or spoke-
    like appearance
34
Q

Central Hemangioma
Age
Site
Sex

A

Teens and young adults

Posterior mandible

Female:male 2:1

35
Q

Central Hemangioma
Management
(2)
Other

A
  • Sclerosing agents, radiation,
    enucleation
  • Embolization of major arteries
    necessary prior to surgery as
    hemorrhage is a significant and life-
    threatening complication

Etiology is either traumatic/developmental
or benign neoplasm

36
Q

Cherubism
Clinical
(3)

A
  • Cherubic looking face by 5 years of age due
    to bilateral bony expansion
  • Asymptomatic
  • Bone lesions are more active in younger
    patients. After age 12, activity usually
    diminishes and finally lesions become
    inactive with residual deformity by age 30
37
Q

Cherubism
Radiographic
(2)

A
  • Bilateral multilocular
    cyst-like, expansile
    lesion, usually
    affecting the
    mandible and
    sometimes the
    maxilla
  • Pathologic fracture
    is not a feature
38
Q

Cherubism
Age
Site
Sex

A

Usually detected by age 5

Bilateral mandible, may affect maxilla

Male:female 2:1

39
Q

Cherubism
Management
Other

A

Cosmetic osseous contouring at age 12 and
later

Benign self-limiting condition

Radiographic Interpretation (13 decks)

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