Od Tumors

Question 1

Origin of CEOT

Answer 1

Stratum intermedium

Question 2

Liesegang ribgs are solitary?

Answer 2

No that can fuse to form mass

Question 3

Special stain of amyloid material

Answer 3

Congo red

Thyoflavin t fluorescent stain

Question 4

Pattern of amyloid in CEOT

Answer 4

cribriform pattern

Question 5

Site of ceot

Answer 5

• central 75% posterior mandible related to untrusted tooth usually
• peripheral gingiva

Question 6

CeOT SIGNES

Answer 6

• slow
• asymptimatic
• disffuse or localized swelling

Question 7

Ttt and prognosis and behaviour of CEOT

Answer 7

• locally invasive
• thin safety margin required
• 15% recurrence
• better prog. Than ameloblastoma

Question 8

Xray of CEOT

Answer 8

Well defined
Uni or multi
Driven snow mixed ro rl
Usually related to unerupted tooth mainly 3rd molar

Question 9

Od fibroma relation to neighbouring teeth

Answer 9

• between roots
• in place of missing tooth
• unerupted

Question 10

In od fibroma What is the difference between WHO type and simple type?

Answer 10

-who has
..more epi nests and cords
..dense collagen stroma to myxoid one
..stroma has calcified cementoid or dentoid

But the plump fibroblast in whorled pattern are the same

Question 11

Site of od fibroma?

Answer 11

• ant to upper 6
• post to lower 6
• peripheral in gingiva or central

Question 12

Diff between xray of CEOT and od fibroma

Answer 12

• ceot is mixed
• both well defined Uni or multi
• ceot related to unerupted tooth mostly
• od fibroma between to teeth

Question 13

Signes of od fibroma

Answer 13

• small–asymptomatic

- large – expansion displacement of teeth mobility and root resorption

Question 14

Od fibroma vs od myxoma in tt and recurrence

Answer 14

Myxoma
Requires safety margin
If simple enucleation recurrence is 25%

-od fibroma
No recurrence

Question 15

Od myxoma relationship to teeth

Answer 15

Unerupted

Missing

Question 16

Od Myxoma growth

Answer 16

Rapid due to accumulation of mucoid material

Question 17

Od myxoma xray

Answer 17

• multilocilar
• thin or thick trabeculae
• soap bubble
• unerupted tooth

Question 18

Fibromyxoma ?

Answer 18

When od myxoma has varying degrees of collagen fibers

Question 19

Difference between benign cementoblastoma and periapical cemental dysplasia in origin

Answer 19

Pcd is a type of bone dysplasia
Vs a
Tumor

Question 20

Difference between benign cementoblastoma and periapical cemental dysplasia in clinical

Answer 20

-pcd in black females 14:1
-pcd solitary or multiple vs single
-pcd happens in lower ant vs lower m and pm
-pcd don’t expand bone vs cementoblastoma that might expand
-pcd is max 1cm
Both are asymptomatic

Question 21

Difference between benign cementoblastoma and periapical cemental dysplasia in xray

Answer 21

-psd has 3 phases

Early late and second

Question 22

Difference between benign cementoblastoma and periapical cemental dysplasia in histology

Answer 22

• pcd starts as fibroblastic tissue

- pcd is acellular

Question 23

Pindporg tumor is

Answer 23

CEOT

Question 24

Cementomas in pm and m region

Answer 24

All except pcd

Question 25

Cementomas more in females than males

Answer 25

All except benign cementoblastoma

Question 26

Cementomas in middle age

Answer 26

All except benign cementoblastoma in the 2nd to 3rd decade

Question 27

Only Cementoma that doesn't cause expansion

Answer 27

Pcd

Question 28

Cementifying fibroma diagnostic problem

Answer 28

Difficult to differentiate from pcd Has same xray Same histo

Question 29

Florid cemento osseus dysplasia

Answer 29

``` -symmetrical Familial Can cause large expansion Histology Acellular cementum with empty spaces and vascular spaces ```

Question 30

Aot site

Answer 30

Anterior max at canine | Central only

Question 31

Xray of AOT

Answer 31

Well defined Unilocular Mixed ^ snow flake Follicular type is surrounding unerupted tooth and extend beyond the cej 75% Extra follicular is between 2 roots 25%

Question 32

Aot expansion pattern

Answer 32

Slowly growing expansion Asymptomatic Less than 3cm

Question 33

Aot special histo

Answer 33

- convoluted bands - sheets of spindle epi cells - scanty ct with cystic ... - duct like structure - dentinoid rarely enamel like

Question 34

Hamartoma

Answer 34

Normal tissue in normal location in excess

Question 35

Complex vs compound odontoma in site

Answer 35

Compound -- max incisor Complex -- max incisor and mand molar region

Question 36

Clinical comparison of both ododntomas

Answer 36

-both are asymptomatic small swelling may be large with bone expansion. - compound is mostly with permanent - complex is mostly in place of missing tooth

Question 37

Ameloplastic fibroma ch.ch histo feature

Answer 37

Juxta epithelial hyalinization | Narrow cell free zone around epi may be found

Question 38

Ameloblastic fibroma vs ameloblastoma?

Answer 38

-more cellular fibrous stroma - cells of fibrous stroma is plump -less fibrous stroma -juxta epithelial hyalinization - narrow cfz -stands(plexiform 2cell layers) and follicles Are smaller Stallate reticulum may be messing Microcyst are rare

Question 39

Ameloblastic fibroma xray

Answer 39

Well defined Multi or uni locular Un erupted tooth relation in 50%

Question 40

Variants of ameloblastic fibroma

Answer 40

``` 1- amrloblastic fibro odontoma Mand=max Mixed ro rl Formation of enamel and dentin 2- am.fibro sarcoma More aggressive with metastasis Mesenchymal components show features of malignancy ```