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5 Cards in this Set
- Front
- Back
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Ameloblastoma:
Character |
-Benign but infiltrative neoplasm featureing slow but persistant growth
-Painless bony expansion -Most common epithelial odontogenic tumore -Cells resemble enamel organ -No enamel formation -Some (20%) originate from follicle or dentigerous cyst -Peak incidence b/n 30 and 40 y/o -Cortex tries to keep up w/ growth |
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Ameloblastoma:
Location |
-Originates anywhere in jaws where teeth from.
-Usually (56%) in mandibular 3rd molare area, sometimes (17%) associated w/ unerupted tooth -Least common location is anterior maxilla -often associated w/ unerupted or impacted tooth |
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Ameloblastoma
X-ray |
-Classically multilocular, but may be unilocular.
-Expands cortex as bone growth tries to keep ahead of tumer, may eventually perforate -Entirely radiolucent (will see locules/traeculae of normal bone, NOT the tumor) |
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Ameloblastoma:
Gross |
-Partly cystic/partly solid
-Solid areas = pure proliferating ameloblastic epithelial cells -Cystic areas = locules lined by similar cells |
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Ameloblastoma:
Histo |
-Resembles enamel organ - looks like it should be able to start forming a tooth.
-Peripheral layer of columnar ameloblastic cells showing palisading and reverse polarity of nuclei -Subnuclear vacuolization -Inner layer duplicates morphology of stellate reticulum |
