Radiolucent lesions of the jaw Flashcards
What is this?
What is this composed of?
Periapical granuloma (poorly defined diffuse borders)
These are pseudocysts that form as a response to persistent infection
They are composed of dense fibrous tissue with an infiltrate of lymphocytes as well as small spicules of bone and
necrotic material
They may progress to periapical abscess with the formation of pus
What is this?
(associated necrotic tooth)
Radicular cyst
Most common form of odontogenic cyst
Unilocular, well defined
What is this?
Residual cyst
What is this?
Dentigerous cyst
unilocular, well-defined, sclerotic boarders, attached to neck of tooth, crown inside cyst
2nd most common odontogenic cyst
Typically associated with lower 3
Describe how a dentigerous cyst forms
- Pathogenesis involves remnants of the enamel organ which do not breakdown
because the tooth does not erupt - Fluid then accumulates between these enamel organ remnants and the crown of the
tooth resulting in a cyst.
Can dentigerous cysts have the capacity to become malignant?
Yes but this is extremely rare
How do keratocysts arise?
From the dental lamina
What is this?
Keratocyst
What can keratocysts resemble?
They can be unilocular or multilocular and resemble
periapical cysts, ameloblastoma, or dentigerous
cysts
What is this?
Keratocyst
What is key when considering and managing keratocysts?
They have a high recurrence rate after surgery (up to 60 %)
The cyst must be completely removed with its
epithelial lining and any associated teeth to
minimise the potential for recurrence
There must be regular post operative reviews to
check for relapse
What is this?
Multiple keratocysts
Gorlin Goltz Syndrome
What is Gorlin-Goltz?
Gorlin-Goltz syndrome is an uncommon autosomal dominant inherited disorder
Involves chromosome 9 and human patched gene
Characterized by multiple odontogenic Keratocysts and basal cell carcinomas,
skeletal, dental, ophthalmic, and neurological abnormalities, intracranial ectopic
calcifications of the falx cerebri, and facial dysmorphism.
How is diagnosis of Gorlin Goltz syndrome confirmed?
Genetic analysis
What is this?
Ameloblastoma
Benign neoplasms
Aggressively invasive
Locally destructive
How do ameloblastomas arise?
Remnants of dental lamina
Where is the most common place to find ameloblastomas?
What age range are most found in?
Posterior body and ramus of the mandible
40-70 year olds
What is this?
Solitary bone cyst
What is this?
Giant cell granuloma
What is this?
Osteomyelitis
What is this?
Osteoblastoma
