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16 Cards in this Set
- Front
- Back
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Tumors of odontogenic epithelium
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* Ameloblastoma
* Malignant ameloblastoma/ameloblastic carcinoma * Clear cell odontogenic carcinoma * Adenomatoid odontogenic tumor * Calcifying epithelial odontogenic tumor * Squamous odontogenic tumor |
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Odontogenic Tumors - General Information
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* Located in areas where teeth can form
* Most are central (within jaws), most are benign * Most are slow-growing - measured in months to years * Radiographic appearance: - Most are well-circumscribed - Some are consistently radiolucent - A few are consistently radiopaque - Some may appear RL with or without RO areas (variable) |
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Ameloblastoma
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* Most common odontogenic tumor (except for odontomas)
* Aggressive "benign" neoplasm |
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Conventional Ameloblastoma
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* May arise in association with dentigerous cyst or unerupted tooth
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Unicystic ameloblastoma
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Differs from conventional ameloblastoma in appearance, treatment, and prognosis
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Peripheral ameloblastoma
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1% of ameloblastomas
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Malignant ameloblastoma
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* Ameloblastoma that metastasizes, but whose primary tumor and metastasis look like normal ameloblastoma microscopically
* Mets many years after first treatment * Mets to lungs, cervical lymph nodes * Radiographically the same as other ameloblastomas * Poor prognosis |
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Ameloblastic carcinoma
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* May be locally aggressive, but does not metastasize
* Poor prognosis |
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Adenomatoid Odontogenic Tumor (AOT)
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* Benign tumor, or possibly a hamartoma
* Formerly included with ameloblastoma * Probably derived from enamel organ epithelium |
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Calcifying Epithelial Odontogenic Tumor (CEOT)
aka Pindborg Tumor |
* Benign tumor, but locally invades surrounding bone
* Odontogenic origin, but of uncertain histogenesis |
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Odontogenic tumors from epithelium and mesenchyme
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* Ameloblastic fibroma
* Ameloblastic fibro-odontoma * Ameloblastic fibrosarcoma * Odontoameloblastoma * Odontoma |
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Ameloblastic Fibroma
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* Benign neoplasm of both odg epithelium and ectomesenchyme
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Ameloblastic Fibro-odontoma
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* Benign neoplasm
* May represent a developing complex odontoma * May represent a progression from ameloblastic fibroma * Unlike odontoma, may continue to grow * Usually unilocular |
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Odontoma
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* Most common odontogenic "tumor", more than all others combined
* May be a developmental anomaly (hamartoma), not a neoplasm (benign) |
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Tumors of odontogenic ectomesenchyme
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* Central odontogenic fibroma
* Odontogenic myxoma * Cementoblastoma * Peripheral odontogenic fibroma * Granular cell odontogenic fibroma |
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Central Odontogenic Fibroma
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* Benign tumor of ectomesenchymal origin, occasionally with epithelial elements
* Uncommon * 1/3 associated with unerupted tooth * Larger ones may present with bony expansion |
