Non-epithelialised non-odontogenic cysts Flashcards
2 types of non-epithelialized primary bone cyst?
solitary bone cyst
aneurysmal bone cyst
common in jaws?
non common - more common in other bone
stafne’s idiopathic bone cavity?
not a cyst - mimics one on radiographs
uncommon
symptomless
where is stafne’s idiopathic bone cavity located?
between premolar region an dangle o the mandible
beneath the inferior dental canal
radiographic presentation of stafne’s idiopathic bone cavity?
round or oval well defined radiolucency
what is this?
stafne’s idiopathic bone cavity
stafne’s idiopathic bone cavity buccal or lingual?
lingual side of mandible
describe the shape of stafne’s idiopathic boen cavity on a radiograph?
saucer shapes depression of varying depth on the lingual side of the mandible
ectopic salivary gland
what is stafne’s idiopathic bone cavity continuous with?
submandibular salivary gland
staphne’s idiopathic cavity need tx?
no
synonyms of solitary bone cyst?
simple bone cyst
traumatic bone cyst
haemorrhagic bone cyst
unicameral bone cyst
who usually gets a solitary bone cyst?
children and adolescents
peak in second decade
Where does the solitary bone cyst appear?
premolar and molar regions of mandible
solitary bone cyst appear in maxilla?
rare
solitary bone cyst asymptomatic or symptomatic?
asymptomatic - usually fond on radiograph
Does solitary boen cyst cause bone expansion?
25% cases - rarely
unilocular or multilocular - solitary cyst?
unilocular
solitary cyst radiographic presentation?
radiolucent
variable size an outline
scalloping around and between roots (characteristic)
well defined margins
- no bone resorption
characteristic feature of solitary cyst?
scalloping around and between roots
differential diagnosis for solitary cyst?
odontogenic keratocyst
keratocyst are usually multilocular and cause bone resorption
How to diagnose solitary bone cyst?
surgical exploration
diagnosis of solitary bone cyst?
walled cavity
no lining
empty cavity or blood coloured fluid - haemorrhagic bleeding aids healing
healing following exploration
spontaneous healing even without surgery
solitary cyst have epithelial lining?
no
its just bone
in solitary bine cysts what are the bony walls covered with?
covered with a layer of loose vascular connective tissue
histopathological appearance of solitary bone cells?
bony walls covered with a layer of loose vascular connective tissue
extravasated blood cells
hemosiderin (remnants of blood cells - shows haemorrhage)
no epithelial lining
Pathogenesis of solitary bone cyst?
relation to trauma
or
disorganisation of haemorrhage
what is an Aneurysmal bone cyst?
blood filled spaces within the cavity
has no blood vessels
2 types of aneurysmal bone cysts?
primary of secondary to other diseases of bone
locatiuonlocation of aneurysmal bone cysts?
posterior mandible
what age range get aneurysmal bone cysts?
children and young adults
Describe the swelling of an aneurysmal bone cyst?
firm expanding swelling causing facial deformity
can sometimes see ballooning of the cortical bone in mandible
is pan a symptom of aneurysmal bone cyst?
could be a symptom
radiographic presentation of aneurysmal bone cyst?
unilocular or multilocular radiolucency
ballooned out appearance due to cortical expansion
If the aneurysmal bone cyst is secondary - what are some associated bone disorders?
fibro-osseous lesions
central giant cell granuloma
histopathology of aneurysmal bone cyst?
non-endothelial lined blood filled spaces
separated by cellular fibrous tissue
multinucleated osteoclast like giant cells
evidence of old and recent haemorrhage
Pathogenesis of aneurysmal bone cysts?
unknown
can be associated with other bone diseases
what are the blood filled spaces separated by in aneurysmal bone cysts?
cellular fibrous tissue
