80 Questions
What is the primary site of metastasizing ameloblastoma?
Mandible
What radiographic feature is associated with ameloblastoma?
Negative in x-ray
What is the characteristic that defines metastasizing ameloblastoma?
Clinical behavior
What is the treatment of choice for extraosseous ameloblastoma?
Conservative surgical excision
What is a characteristic histopathological feature of intraosseous ameloblastoma that can also be seen in extraosseous ameloblastoma?
All histopathological features
What is the primary reason for the surgical removal of ameloblastoma with a safety margin?
To prevent recurrence
What is the significance of the different histopathologic patterns of ameloblastoma?
They have no clinical significance
Which type of ameloblastoma has a more favorable prognosis?
Luminal and intraluminal unicystic ameloblastoma
What is the recommended treatment for luminal and intraluminal unicystic ameloblastoma?
Enucleation
What is the recommended reading material for students to review the histopathological classification of odontogenic tumors?
Both of the above
What is the characteristic histopathological feature of the follicular pattern of basal cell ameloblastoma?
Composed of nests of uniform basaloid cells
What is the primary reason for the desmoplastic pattern of ameloblastoma?
Increased production of transforming growth factor B (TGF-B)
What is the main reason for including an area of bone beyond the apparent radiographic margin in the treatment of ameloblastoma?
Because the tumor tends to infiltrate between intact cancellous bone trabeculae before bone resorption becomes radiographically evident
What is the characteristic feature of the plexiform pattern of ameloblastoma?
Long anastomosing cords of odontogenic epithelium in connective tissue stroma
What is the prognosis of ameloblastoma?
It has a high recurrence rate
Which type of ameloblastoma is the most common?
Conventional or classical or intraosseous ameloblastoma
What is the characteristic radiographic feature of ameloblastoma?
Multilocular radiolucency with a honeycomb or soap-bubble appearance
What is the clinical behavior of metastasizing ameloblastoma?
It is a highly aggressive tumor with rapid metastasis
What is the characteristic histopathological feature of extraosseous ameloblastoma?
Mixed follicular and plexiform pattern
What is the primary treatment option for malignant ameloblastomas?
Surgical excision
What is the most common precursor of primary intraosseous carcinoma?
Radicular/residual cysts
What is a characteristic feature of ameloblastic carcinoma?
Presence of dysplasia
What is the most common site of metastasis for ameloblastoma?
Lungs
What is the malignant counterpart of ameloblastoma?
Ameloblastic carcinoma
What is the most common odontogenic tumor excluding odontomas?
Ameloblastoma
What is the primary composition of odontogenic tumors of the jaws?
Odontogenic epithelium and ectomesenchyme
What is the most common benign odontogenic tumor?
Ameloblastoma
What is the characteristics of ameloblastoma?
Progressively growing with a tendency for local recurrence
What is the composition of mixed odontogenic tumors?
Both odontogenic epithelium and ectomesenchyme
Where are odontogenic tumors typically found?
Exclusively in the mandible and maxilla, and occasionally in the gingiva
What is the primary location where unicystic ameloblastoma most commonly occurs?
Mandible posterior region
Which of the following histopathologic variants of unicystic ameloblastoma is characterized by a cyst wall lined totally or partially by ameloblastic epithelium?
Luminal
What is the recommended treatment for mural type of unicystic ameloblastoma?
Marginal resection
What is the characteristic feature of extraosseous peripheral ameloblastoma?
Painless, sessile, exophytic mass with smooth or papillary surface
What is the recommended follow-up period for unicystic ameloblastoma?
At least 25 years
Which of the following is a characteristic radiographic feature of unicystic ameloblastoma?
Well-defined unilocular radiolucency
What is the age range when unicystic ameloblastoma is usually diagnosed?
2nd decade
What is the most common association with unicystic ameloblastoma on radiographs?
Unerupted tooth
What is the term for the ameloblastoma that occurs in the soft tissue of gingiva or edentulous alveolar areas?
Extraosseous ameloblastoma
What is the percentage of all ameloblastomas that unicystic ameloblastoma accounts for?
5-22%
What defines a benign odontogenic tumor composed of both odontogenic epithelium and ectomesenchyme?
Combination of both epithelial and ectomesenchymal origin
What is the most common type of odontogenic tumor that arises from odontogenic epithelium only?
Ameloblastoma
What is the composition of odontogenic tumors that arise from odontogenic ectomesenchyme only?
Dental papilla and dental follicle
What is the characteristic feature of mixed odontogenic tumors?
Combination of both epithelial and ectomesenchymal origin
What is the significance of understanding the spectrum of odontogenic tumors?
To understand the variation in radiological and histopathological features
What is a characteristic feature of ameloblastic fibroma on radiographic examination?
Well-defined unilocular or multilocular radiolucent lesion
What is the primary component of the mesenchymal portion of an ameloblastic fibroma?
Myxoid tissue with stellate cells
What is the recommended treatment for extensive destructive ameloblastic fibroma?
Radical surgical removal
What is the characteristic feature of odontomas?
Mixed epithelial and mesenchymal tumor-like malformations
What is the primary concern for patients with Gardner's syndrome?
High risk of transformation of colorectal polyps into adenocarcinoma
What is the typical location of Calcifying Epithelial Odontogenic Tumor (Pindborg tumor)?
Posterior area of the mandible
What is the characteristic histopathological feature of Calcifying Epithelial Odontogenic Tumor (Pindborg tumor)?
Discrete islands of neoplastic epithelial cells with prominent intercellular bridges
What is a common radiographic feature of Calcifying Epithelial Odontogenic Tumor (Pindborg tumor)?
A well-circumscribed, multilocular radiolucency
What is the characteristic protein secreted by Calcifying Epithelial Odontogenic Tumor (Pindborg tumor)?
Amyloid protein
What is the histopathological feature of Calcifying Epithelial Odontogenic Tumor (Pindborg tumor) that may raise the possibility of malignancy?
Pleomorphism of nuclei
What is the age range of patients commonly affected by odontogenic myxoma?
1-73
What is the characteristic radiographic appearance of odontogenic myxoma?
Honeycomb or soap bubble appearance
What is the histopathological characteristic of odontogenic myxoma?
Loosely textured tissue with large stellate or fusiform cells
What is the composition of mixed odontogenic tumors?
Both odontogenic epithelium and ectomesenchyme
What is the most common type of benign odontogenic tumor?
Odontoma
What is the characteristic radiographic feature of cementoblastoma?
A radiopaque mass with a thin radiolucent rim
What is the primary composition of mixed odontogenic tumors?
Both odontogenic epithelium and ectomesenchyme
What is the treatment of choice for cementoblastoma?
Surgical extraction of the tooth together with the attached calcified mass
What is the characteristic histopathological feature of cementoblastoma?
Calcified cementum-like material with reversal lines
What is the most common site of ameloblastic fibroma?
Posterior mandible
What is a characteristic clinical feature of odontomas?
They are frequently associated with unerupted tooth
What is the main difference between compound and complex odontoma?
Macroscopic appearance
What is the radiographic appearance of compound odontoma?
A collection of tooth-like structures
What is the histopathological feature of complex odontoma?
Mature tubular dentin that encloses clefts or hollow circular structures
What is the macroscopic appearance of complex odontoma?
A white bony hard mass
What is the prognosis of odontoma?
Good
What is the treatment of choice for odontoma?
Surgical removal
What is the difference between compound and complex odontoma in terms of location?
Compound odontoma occurs in the anterior maxilla, while complex odontoma occurs in the posterior mandible
What is the characteristic histopathological feature of compound odontoma?
Multiple structures resembling small single rooted teeth
What is the radiographic appearance of complex odontoma?
A disorganized mass of calcified tissue
What is the characteristic clinical feature of adenomatoid odontogenic tumor?
Painless expansion of bone
What is the classification of adenomatoid odontogenic tumor?
Epithelial odontogenic tumor
What is the characteristic radiographic feature of adenomatoid odontogenic tumor?
Well-defined unilocular radiolucency with fine radiopacities
What is the significance of the tumor's capsule in adenomatoid odontogenic tumor?
It allows easy removal from bone
What is the characteristic histopathological feature of adenomatoid odontogenic tumor?
Masses, sheets or strands of spindle cells in scanty fibrous stroma
This quiz covers the histopathological features of various oral pathologies, including basal cell carcinoma and desmoplastic ameloblastoma.
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