Odontogenic Tumours Flashcards
how are odontogenic tumours usually discovered
non-eruption of teeth/late stage bony expansion or other imaging
what is the classification of odontogenic tumours
epithelial
mesenchymal
mixed
what are the odontogenic sources of epithelium
rests of malassez
rests of serres
reduce enamel epithelium
name 3 epithelial tumours
ameloblastoma
adenomatoid odontogenic tumour
calcifying epithelial odontogenic tumour
name a mesenchymal tumour
odontogenic myxoma
name a mixed tumour
odontoma
where do ameloblastomas usually occur
posterior mandible
what is the radiological appearance of ameloblastomas
multicystic
(can be unicystic in young patients)
well-defined corticated margins
potentially scalloped margins
thick curved septa giving soap bubble appearance
radiolucent
what happens to the adjacent structures with an ameloblastoma
displacement
thinning of bony cortices
knife edge external root resorption
what is the histology of a follicular ameloblastoma
islands present within fibrous tissue background
islands have ameloblast like cells surrounding them
tissue in middle of follicles
cystic changes within follicles
no connective tissue
what is the histology of plexiform ameloblastoma
ameloblastoma like cells arranged in strands
stellate reticulum
fibrous tissue
no connective tissue
how does the lack of connective tissue in ameloblastomas impact prognosis
means it can easily grow and infiltrate into the jaw causing high recurrence rate
what is the management of ameloblastomas
surgically resect with 1cm margin
if an ameloblastoma turns malignant what is it then called
ameloblastic carcinoma
who usually gets an adenomatoid odontogenic tumour
teenagers
