bone differential dx

Question 1

location of bone dx is dependent on

Answer 1

localized/generalized
position of jaws
single or multifocal

Question 2

if a lesion is generalized

Answer 2

it effects all of the osseous structures of the maxilliofacial region

Question 3

localized lesions can be

Answer 3

unilateral or bilateral

Question 4

position in the jaws aids diagnostic process by

Answer 4

determining the center of the location and they tend to be found in specific locaitons

Question 5

if the origin center is coronal or above the IA nerve canal, it is likely to have what origin

Answer 5

odontogenic origin

Question 6

if the origin is below the IAC, it doesn’t have what origin

Answer 6

odontogenic

Question 7

if the origin is within the IAC, the lesion has what origin

Answer 7

neural or vascular

Question 8

if the origin of the lesion is within condylar areas, it is likely to have what origin

Answer 8

cartilagenous lesions

Question 9

t/f if the origin of the lesion is within the max sinus, the origin is likely to have odonogenic

Answer 9

false

Question 10

t/f most lesions can grow to any size

Answer 10

true

Question 11

what type of lesions can stop growing

Answer 11

odontomas

Question 12

hydraulic shape

Answer 12

somewhat circular, appears to be fluid filled or inflated balloon

Question 13

scalloped shape

Answer 13

deals with the outside shape, series of contiguous arcs or semicircles

Question 14

poor defined borders usually indicate

Answer 14

cancer

Question 15

corticated border

Answer 15

uniform radiopaque line at periphery of lesion, well defined

cysts and tumors

Question 16

punched out/non corticated

Answer 16

sharp boundary with narrow transition; no bone reaction seen/ no radiopaque line; well defined

Question 17

soft tissue capsule

Answer 17

radiolucent line at periphery; may be seen in conjunction with corticated periphery

Question 18

sclerotic borders

Answer 18

wider zone of transition with thick radiopaque border of reactive bone; brushed look
sign of inflammation

Question 19

t/f. all cysts are radiolucent except for 1

Answer 19

true

Question 20

abnormal trabecular patterns

Answer 20

variation of number, length, width, and orientation of trabeculae

Question 21

internal sepatation

Answer 21

long strands of bone or walls within a lesion

Question 22

multilocular

Answer 22

internal structure divided into different compartments

tumor leaves empty bubbles, don’t get it messed up with mixed

Question 23

t/f tumors and cysts are space occupying lesions

Answer 23

true

Question 24

odontogenic lesions tend to push teeth

Answer 24

apically

Question 25

bone lesions and hematopoetic lesions tend to push teeth

Answer 25

coronally

Question 26

benign tumors and cysts resorb the tooth how

Answer 26

directional resorption

Question 27

malignant tumors tend to resorb the tooth how

Answer 27

non-directional resorption

Question 28

orthodontic movement in pdl

Answer 28

uniform widening with lamina dura intact

Question 29

malignant lesions in pdl

Answer 29

irregular widening and destruction of lamina dura

Question 30

IA canal/mental foramen displacement is indicative of what type of process

Answer 30

benign (its pushing things, not invading them like a malignancy), then it will resorb it

Question 31

what type of lesions have expanded borders of the outer cortex

Answer 31

slowly growing lesions | cysts and tumors

Question 32

what type of lesions have perforated borders of the outer cortex

Answer 32

rapidly growing lesions | malignancies

Question 33

reactive lesions

Answer 33

lift off the cortical bone and stimulate osteoblasts to lay down new bone

Question 34

2 types of periosteal reactions

Answer 34

reactive and inflammatory

Question 35

characteristics of slowly growing lesions

Answer 35

``` sharply defined borders corticated borders displaces normal anatomical structures expands rather than perforated normal mucosa pain/paresthesia is uncommon ```

Question 36

characteristics of rapidly growing lesions

Answer 36

``` poorly defined borders destroys normal anatomical structures perforation of the cortical plate more common crepitus ulceration pain/paresthesia ```

Question 37

mixed lesion

Answer 37

some lesions can make a mineralized product | radiograph depends on the amount and distribution of the mineralized product

Question 38

radiolucent lesions

Answer 38

some lesions consistently appear radiolucent because they do not make a mineralized product

Question 39

inflammatory lesions mimic

Answer 39

malignancies

Question 40

characteristic of inflammatory lesions

Answer 40

pooly defined borders variable pain sometimes associated with fever, malaise, leukocytosis, tender lymphadenopathy

Question 41

malignant neoplasms of the bone

Answer 41

poorly defined. destroys anatomical stucture | metastatic

Question 42

t/f. most common malignancy of the jaw did not start in the jaw and started from somewhere else

Answer 42

true (metastatic carcinoma)

Question 43

primary disease of the bone involve

Answer 43

multiple areas of the skeleton

Question 44

characteristics of cysts

Answer 44

corticated borders common hydraulic appearance on radiographs may arise from odontogenic or non-odontoogenic epithelium appearance of odontogenic cyst may also be an odontogenic tumor

Question 45

characteristics of benign odonntogenic tumor

Answer 45

arise in the tooth forming areas of the jaw slowly growing can be present before pt seeks tx malignancies are rare

Question 46

what benign non odonto tumor is not slowly growing

Answer 46

central giant cell granuloma

Question 47

what benign non-donto tumor doesn't have sharply demarcated borders

Answer 47

fibrous dysplasia

Question 48

definitive dx of bone lesions requires correlation of

Answer 48

radiographs, clinical info, and microscopic examination

Question 49

gold standard of biopsies

Answer 49

full tissue

Question 50

why submit a biopsy

Answer 50

``` make a definitive dx confirm provisional clinical dx establish surgical margins get info to help disease management know more about clinical behavior and px substantiate pt records in legal context ```

Question 51

enucleation

Answer 51

removal of lesion only

Question 52

curettage

Answer 52

removal of lesion and some surrounding bone with hand instrument

Question 53

peripheral ostectomy

Answer 53

removal of lesion and some surrounding bone with rotary insturment

Question 54

en bloc resection/segmental resection

Answer 54

resection of lesion and bone with clear margin

Question 55

decompression/marsupializaiton

Answer 55

used to decrease the size of cysts; pop a hole and put a stent inside

Question 56

infiltrating cancers

Answer 56

the fingers/tenticles of a tumor beyond its main mass | this is why you'd resect a cancer