Week 12: Odontogenic Tumors Flashcards
what does “-genic” mean?
give rise to, offspring
tumors that arise from tissues associated with tooth development
odontogenic tumors
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benign tumor of odontogenic epithelium
ameloblastoma, adenomatoid odontogenic tumor
three types of ameloblastoma
multicystic, cystic, peripheral
micro appearance of ameloblastoma
columnar epithelial cells, stellate reticulum cells
ameloblastomas are _______ but cured with ______ resection
locally aggressive, surgical
multicystic ameloblastoma characteristics
- intraosseous
- very large
- usually on mandible in patients > 25
- soap bubble appearance
cystic ameloblastoma characteristics
- intraosseous
- large
- usually in young patients (16-20)
- near crown of impacted tooth
peripheral ameloblastoma characteristics
- extraosseous
- small
- firm moveable module in gingiva
- occurs in older patients
adenomatoid odontogenic tumor characteristics
- benign
- usually in young patients (14-15)
- not aggressive
gross appearance of adenomatoid odontogenic tumor
unilobular cyst
micro appearance of adenomatoid odontogenic tumor
resembles granular tissue
gross appearance of odontogenic myxoma
intraosseous mass with multiple cystic spaces (soap bubbles)
micro appearance of odontogenic myxoma
undifferentiated cells in abundant myxoid (ground substance) background, sometimes collagen fibers
characteristics of odontogenic myxoma
- benign
- aggressive
- treated with block excision
benign tumor of odontogenic connective tissue
odontogenic myxoma
benign tumor of cementoblasts
cementoblastoma
cementoblastoma characteristics
- rare
- peak age 19
- painful lesion in molar/premolar area
- treated by removing tumor and tooth
gross appearance of cementoblastoma
well-circumscribed mass in continuity with cementum of tooth
micro appearance of cementoblastoma
cementum-like tissue with loose intervening stroma
most common odontogenic tumor (70% of all odontogenic tumors)
odontoma
characteristics of odontomas
- common
- usually occurs in patients under 20
- found adjacent to unerupted teeth
- easily removed from bone, doesn’t recur
micro appearance of odontomas
a mixture of tooth components (enamel,
dentin, pulp and cementum)
two types of odontomas
- complex (gnarled mass of tissue)
- compound (toothlets)
