Non-epithelialised non-odontogenic cysts

Question 1

2 types of non-epithelialized primary bone cyst?

Answer 1

solitary bone cyst

aneurysmal bone cyst

Question 2

common in jaws?

Answer 2

non common - more common in other bone

Question 3

stafne’s idiopathic bone cavity?

Answer 3

not a cyst - mimics one on radiographs

uncommon

symptomless

Question 4

where is stafne’s idiopathic bone cavity located?

Answer 4

between premolar region an dangle o the mandible

beneath the inferior dental canal

Question 5

radiographic presentation of stafne’s idiopathic bone cavity?

Answer 5

round or oval well defined radiolucency

Question 6

what is this?

Answer 6

stafne’s idiopathic bone cavity

Question 7

stafne’s idiopathic bone cavity buccal or lingual?

Answer 7

lingual side of mandible

Question 8

describe the shape of stafne’s idiopathic boen cavity on a radiograph?

Answer 8

saucer shapes depression of varying depth on the lingual side of the mandible

ectopic salivary gland

Question 9

what is stafne’s idiopathic bone cavity continuous with?

Answer 9

submandibular salivary gland

Question 10

staphne’s idiopathic cavity need tx?

Answer 10

no

Question 11

synonyms of solitary bone cyst?

Answer 11

simple bone cyst

traumatic bone cyst

haemorrhagic bone cyst

unicameral bone cyst

Question 12

who usually gets a solitary bone cyst?

Answer 12

children and adolescents

peak in second decade

Question 13

Where does the solitary bone cyst appear?

Answer 13

premolar and molar regions of mandible

Question 14

solitary bone cyst appear in maxilla?

Answer 14

rare

Question 15

solitary bone cyst asymptomatic or symptomatic?

Answer 15

asymptomatic - usually fond on radiograph

Question 16

Does solitary boen cyst cause bone expansion?

Answer 16

25% cases - rarely

Question 17

unilocular or multilocular - solitary cyst?

Answer 17

unilocular

Question 18

solitary cyst radiographic presentation?

Answer 18

radiolucent

variable size an outline

scalloping around and between roots (characteristic)

well defined margins

• no bone resorption

Question 19

characteristic feature of solitary cyst?

Answer 19

scalloping around and between roots

Question 20

differential diagnosis for solitary cyst?

Answer 20

odontogenic keratocyst

keratocyst are usually multilocular and cause bone resorption

Question 21

How to diagnose solitary bone cyst?

Answer 21

surgical exploration

Question 22

diagnosis of solitary bone cyst?

Answer 22

walled cavity

no lining

empty cavity or blood coloured fluid - haemorrhagic bleeding aids healing

healing following exploration

spontaneous healing even without surgery

Question 23

solitary cyst have epithelial lining?

Answer 23

no

its just bone

Question 24

in solitary bine cysts what are the bony walls covered with?

Answer 24

covered with a layer of loose vascular connective tissue

Question 25

histopathological appearance of solitary bone cells?

Answer 25

bony walls covered with a layer of loose vascular connective tissue extravasated blood cells hemosiderin (remnants of blood cells - shows haemorrhage) no epithelial lining

Question 26

Pathogenesis of solitary bone cyst?

Answer 26

relation to trauma or disorganisation of haemorrhage

Question 27

what is an Aneurysmal bone cyst?

Answer 27

blood filled spaces within the cavity has no blood vessels

Question 28

2 types of aneurysmal bone cysts?

Answer 28

primary of secondary to other diseases of bone

Question 29

locatiuonlocation of aneurysmal bone cysts?

Answer 29

posterior mandible

Question 30

what age range get aneurysmal bone cysts?

Answer 30

children and young adults

Question 31

Describe the swelling of an aneurysmal bone cyst?

Answer 31

firm expanding swelling causing facial deformity can sometimes see ballooning of the cortical bone in mandible

Question 32

is pan a symptom of aneurysmal bone cyst?

Answer 32

could be a symptom

Question 33

radiographic presentation of aneurysmal bone cyst?

Answer 33

unilocular or multilocular radiolucency ballooned out appearance due to cortical expansion

Question 34

If the aneurysmal bone cyst is secondary - what are some associated bone disorders?

Answer 34

fibro-osseous lesions central giant cell granuloma

Question 35

histopathology of aneurysmal bone cyst?

Answer 35

non-endothelial lined blood filled spaces separated by cellular fibrous tissue multinucleated osteoclast like giant cells evidence of old and recent haemorrhage

Question 36

Pathogenesis of aneurysmal bone cysts?

Answer 36

unknown can be associated with other bone diseases

Question 37

what are the blood filled spaces separated by in aneurysmal bone cysts?

Answer 37

cellular fibrous tissue