3. 3
Odontogenic Tumors
• They develops as neoplasias from the dental
lamina. They are usually benign but several
of them have the tendency towards malignant
transformation.
• Because growth occurs only slowly,
asymptomatically and without any changes in
mucosal appearance,
• The existence of such lesions in their early
stages is usually detected only by chance, or
after the development of some structural
deformation.
4. 4
Ameloblastoma
• Benign but locally invasive neoplasm.
• Arises from epithelial remnants of dental
lamina or dental organ.
• Cells do not differentiate enough to form
enamel.
• Extreme expansion of bone,
• Resorption of adjoining roots.
• May cause perforation of cortical bone.
• Average age at discovery: 35-40 years.
6. 6
Ameloblastoma (Cont.)
• Occasionally develops in the wall of
dentigerous cyst (mural Ameloblatoma).
• 80% in mandible. ¾ of these in molar-
ramus area.
• Pain and paresthesia not common.
• Extremely high recurrence rate.
7. 7
Ameloblastoma (Cont.)
• Most often a well-corticated multilocular
radiolucency.
• “Honey-comb”, “soap-bubble” or “tennis-racket”
appearance.
• May be a well-corticated unilocular lesion
resembling a cyst.
Honeycomb-like small
ameloblastoma at early stage with
evidence of root resorption.
10. 10
Ameloblastoma
Large multilocular soap bubble appearance.
Typically located in the molar region, angle of the
mandible and ascending ramus
Thin not penetrated cortical plate.
Impacted or neighboring teeth are displaced with
roots often resorped.
16. 16
Ameloblastic fibroma
• Appears as a follecular
cystic cavity
surrounding a crown
of a tooth.
• In early stages appears
as a hat upon the
occlusal surface of
affected tooth
17. 17
• More advanced case of ameloblastic fibroma
demonstrates how the follicular sac is opened.
• Note also the displacement of the tooth bud of
lower 8 in the ascending ramus
18. 18
Odontogenic myxoma
• It is a benign, mucous-
containing tumor that
originates from the
tooth bud.
• It appears as a soap
bubble-like
appearance.
19. 19
Cementoma
• Usually appears at lower
anterior area.
• First appears as fibrous
tissue stage, which may
confused with a
granuloma (vitality test).
• The second stage is
characterized with
accumulation of calcified
materials.
• The third stage consists of
radio-opaque materials.
Early stage
23. 23
Cementoblastoma
( True Cementoma )
• Slow growing
neoplasm composed
of cementum.
• Usually solitary
lesion seen as a
growth on root of
tooth.
• Most common in
mandible, premolar
or 1st molar (80%).
25. 25
Cementoblastoma
• It not removed after
tooth extraction
• Remarks the RL
related to canine and
second premolar, it is
another
cementoblastoma in
the fibrous stage.
26. 26
Cementoblastoma
• Another case
remaining after tooth
extraction.
• It surrounded by the
radiographic signs of
chronic inflammation.
• Periapical cemental
dysplasia related to 4
tooth
34. 34
Compound Composite Odontoma
• Composed of enamel
and dentin.
• Enamel and dentin
are laid down in an
orderly fashion so
that the mass has
some similarity to
normal teeth.
• Appears like a bunch
of small teeth.
40. 40
Central Hemangioma
• Tumor characterized by
proliferation of blood
vessels.
• Central hemangiomas of
jaws uncommon.
• 50% occur in children
and teens.
• More common in females
and mandible.
• Well-defined or ill-
defined, unilocular or
multilocular radiolucency.
41. 5/4/2016 Ossama El-Shall 41
Central Hemangioma (Cont.)
• May cause expansion of bone and
resorption of teeth.
• Early treatment is desirable in order
to avoid profuse bleeding due to
accidental trauma. Aspiration prior to
surgical procedure is advised.
45. Benign tumors
• Growth by direct extension
• Insidious onset
• Well defined borders
• Rl + RO
• Tooth displacement, or
root resorption
• Expansion or thinning of
cortical bone
45
Malignant tumors
Growth by infeltration and
distruction
Sudden onset
Ill defined borders
Punched out borders
Totally RL
Destruction of alveolar
bone, teeth floating or
displaced occlusally
Erosion and destruction
of cortical bone
46. 46
Sarcoma
This tumor, which affects males twice as
females, exhibit a predilection for the
mandible.
Radiographically, bone destruction as well as
new bone formation and osteolysis can be
observed, along with perforation of the
compact bone with spicules (sunrays
effect), where the lesion borders on the
soft tissues
47. 47
Mixed form of ostiosarcoma: In addition to areas of
new bone formation, osteolysis and
destruction of the compact bone can be
observed. Note the areas of spicules
(arrows)
61. CEOT
Unilocularor Multiocular+ RO Foci
• 40 y.
• Males
• Mand. Molar Ramus area
• Mostly Related to impacted/ unerupted tooth (50%)
• Calcific foci are numerous closely located to the crown
(snow driven appearance)
• Sever expansion (less than ameloblastoma) +
maintenance of cortical boundaries
• Teeth Displacement
Rare tumor
64. AOT
• Wide age range:
around 16 years
Females > Males
• Mainly anterior maxilla
• ⅔ Mixed (RL +RO):
RL surrounds more than the crown: not at CEJ
RO: Dense clusters OR Faint foci (Snow flecks
appearance)
67. 1- Odontoma
Odontomas are developmental malformation
( hamartoma) of dental tissue, it is not neoplasm
Very important - very common – children
Two main Types
Compound = normal arrangement of dental tissues
Complex = abnormal mass of Calcification
69. Odontoma
• 2nd decade (young age )
• Complex: ♀ Compound ♀=♂
Mand. Molar Max. Ant.
• Maturtion:RL…Mixed…..RO
• Surrounded by RL rim
• Discovered while searching for the cause of
unerupted permanent or retained deciduous
• Easily identified upon Shape & Density
• It’s the most common odontogenic tumor
70.
71. Odontomas
The compound type shows apparent tooth shapes while the complex type
appears as uniform opaque mass with no apparent tooth shapes present
Compound Complex
72. 2-Ameloblastic Fibroma
• 2nd decade
• ♀ = ♂
• Mand. Molar - premolar
• Discovered while searching for the cause
of unerupted tooth or because of the facial
swelling & Occ. pain they cause
• Identified upon:
-Outwards growth from the follicle
-Grows towards the alveolar process
• Hat cap like RL
75. 3-Am. Fibro-Odontoma
• 2nd decade
• ♀ = ♂
• Mand. Molar - premolar
• Discovered while searching for the cause
of unerupted tooth
• Identified upon:
-Outwards growth from the follicle
-Grows towards the alveolar process
-RO: discrete foci 1 – 2 if small lesion
extensive calcification if large
40 y, ♂, Not as an outward growth
RL
79. Od. Myxoma
Multilocular (Soap bubble > Tennis-racket)
Pericoronal to unerupted tooth or from a tooth that failed to develop
• 2nd- 3rd decade, ♀
• Mand. > Max. Molar – premolar.
• Discovered while searching for the cause of unerupted tooth
• Identified upon:
-Grows along the bone, lees likely to expand
-Grows around teeth causing scalloping, loosening, displacement of teeth but
rarely resorption
124. 124
Effects on surrounding structures:
i-Early :widening of the
periodontal membrane
• Loss of cortices and lamina dura.
• Floating or hanging teeth
127. Naglaa S. El Kilani
127
“Sunray” Periosteal Reaction
• Osteosarcoma
• Chondrosarcoma
• Ewing’s Sarcoma
128. D-Ewing’s sarcoma
-It is a rare highly malignant
tumor of long bones and
is relatively rare in the jaws.
-The arise in the medullary
portion of bone and spread
to the endosteal and later periosteal surfaces.
137. Describe? D.D?
• Solitary ill
defined
radiolucent
area related to
lower right
molars and
causing
invasion of the
IAC.
138. What is the view? Describe? D.D?
• Inflammatory
1. Chronic osteomyelitis
2. Osteoradionecrosis
• Neoplastic
1. Squamous cell
carcinoma
2. Metastatic tumors to
the jaws
3. Osteosarcoma and
chondrosarcoma
139. Describe? D.D?
• What is the D.D? Solitary irregular periapical
radiolucent area related to
upper left lateral and
causing extensive
interproximal bone loss of
the adjacent tooth.
D.D:
• Chronic alveolar abscess
• Chronic osteomyelitis
• Osteoradionecrosis
• Squamous cell carcinoma
• Metastatic tumors to the jaws
• Osteosarcoma and
chondrosarcoma
• Fibrous dysplasia (early stage)
143. Case study
• A 20-year old male patient
reported to the
Department of Oral
Medicine, with chief
complaint of swelling in
the lower half of the left
side of and inability to
chew food at the same
side.
• What is the D.D?