Term
| Clinical features of ameloblastoma |
|
Definition
Age: 40 yrs
Mandible molar ramus area
Asymptomatic expansion
M=F |
|
|
Term
| Where do you find ameloblastomas? |
|
Definition
| mandible molar ramus area |
|
|
Term
| Radiographic features of ameloblastomas |
|
Definition
Uni or multilocular radiolucency
Patterns: "soap bubble", "honey comb"
Root resorption
Sclerotic margins |
|
|
Term
| Microscopic features of ameloblastomas |
|
Definition
Microscopic diagnostic criteria: nuclear palisading, reverse polarization, hyperchromatism and cytoplasmic vacuolization of basal cells
Patterns: most common are follicular and plexiform |
|
|
Term
| Differential diagnosis of ameloblastomas |
|
Definition
| Lateral periodontal cyst (unilocular), myxoma, dentigerous cyst, OKC, ameloblastic fibroma, central giant cell lesion, ABC, central hemangioma |
|
|
Term
| Treatment for ameloblastomas |
|
Definition
| marginal resection, resection |
|
|
Term
| Clinical features of unicystic ameloblastomas |
|
Definition
Age: 2nd to 3rd decades
Typically in mandibular molar area
< 10% recurrence when curettage is 1° treatment |
|
|
Term
| Where do you find unicystic ameloblastomas? |
|
Definition
|
|
Term
| Radiographic features of unicystic ameloblastomas |
|
Definition
| radiolucency associated with impacted third molar |
|
|
Term
| Microscopic features of unicystic ameloblastomas |
|
Definition
| Cyst lined by ameloblastic epithelium |
|
|
Term
| Differential diagnosis of unicystic ameloblastomas |
|
Definition
|
|
Term
| Treatment for unicystic ameloblastomas |
|
Definition
| Enucleation and close follow-up |
|
|
Term
| Clinical features of calcifying epithelial odontogenic tumor (CEOT) |
|
Definition
Mean age: 40 yrs.
M=F
Painless, slow growing
Most common in mandible (molar/premolar area)
Often associated to an impacted tooth |
|
|
Term
|
Definition
| mandible (molar/premolar area) |
|
|
Term
| Radiographic findings of early stage CEOT? |
|
Definition
| uni or multilocular radiolucency associated to an impacted tooth. Root resorption |
|
|
Term
| Radiographic findings of late stage CEOT? |
|
Definition
Uni or multilocular with radiopacities around the crown of an
impacted tooth |
|
|
Term
| Microscopic features of CEOT |
|
Definition
Large polygonal epithelial cells with eosinophilic cytoplasm and nuclei of various sizes.
Amyloid
Liesegang rings |
|
|
Term
| Differential diagnosis of radiolucent CEOT |
|
Definition
| dentigerous cyst, ameloblastoma, OKC, myxoma |
|
|
Term
| Differential diagnosis of mixed radiolucent/radiopaque CEOT |
|
Definition
| COT, AOT, ameloblastic fibro-odontoma, ossifying fibroma, osteoblastoma |
|
|
Term
|
Definition
| conservative local resection with a rim of normal tissue. Recurrence rate less than 20% |
|
|
Term
| Clinical features of adenomatoid odontogenic tumor (AOT) |
|
Definition
Age: Most cases in the 2nd decade
F:M (2:1)
Painless, enlargement of the maxillary lateral incisor - canine
area
More common in maxilla (64%) |
|
|
Term
|
Definition
| maxillary lateral-incisor area (more common in maxilla) |
|
|
Term
| Radiographic features of AOT |
|
Definition
Well-circumscribed, unilocular
pericoronal area of an impacted tooth
RL + / - RO (snowflake)
Divergence of teeth is possible |
|
|
Term
| Microscopic features of AOT |
|
Definition
| Intracystic rosettes and duct-like structures of columnar epithelial cells |
|
|
Term
| Differential diagnosis of AOT if calcified |
|
Definition
|
|
Term
| Differential diagnosis of AOT if non-calcified |
|
Definition
| lateral radicular cyst, dentigerous cyst, ameloblastic fibroma |
|
|
Term
|
Definition
|
|
Term
| Clinical features of odontogenic myxoma |
|
Definition
Mean age: 30 yrs
More common in mandible
Asymptomatic expansion
M=F |
|
|
Term
| Radiographic features of odontogenic myxoma |
|
Definition
Uni or multilocular radiolucency
Pattern: "Soap bubble", "step ladder"
Root resorption
Sclerotic margins |
|
|
Term
| Microscopic features of odontogenic myxoma |
|
Definition
| Haphazardly arranged stellate, spindle shaped cells amidst a loose, myxomatous matrix with sparse collagen fibrils |
|
|
Term
| Differential diagnosis of odontogenic myxoma if unilocular radiolucency not between roots |
|
Definition
| Hyperplastic follicle, ameloblastic fibroma, dentigerous cyst, AOT, OKC, COC |
|
|
Term
| Differential diagnosis of odontogenic myxoma if unilocular radiolucency between roots |
|
Definition
| OKC, lateral periodontal cyst |
|
|
Term
| Differential diagnosis of odontogenic myxoma if multilocular radiolucencies |
|
Definition
| Ameloblastoma, central giant cell L, OKC, ameloblastic fibroma, COC, central hemangioma, ABC |
|
|
Term
| Treatment for odontogenic myxoma for small lesions |
|
Definition
| curettage and close follow-up for at least 5 years |
|
|
Term
| Treatment for odontogenic myxoma for large lesions |
|
Definition
|
|
Term
| Clinical features of central odontogenic fibroma (COF) |
|
Definition
Mean age: 40 yrs.
F:M (2:1)
Most maxillary lesions are anterior to first molars
Most mandibular lesions are posterior to mandibular molars
One third associated to an unerupted tooth |
|
|
Term
| Radiographic findings for small COF and large COF |
|
Definition
small: asymptomatic unilocular and often associated to periradicular area
large: both expansion and loosening of teeth
Sclerotic border, root resorption and divergence. Radiopaque flecks in 12% |
|
|
Term
| Microscopic features of COF |
|
Definition
| Collagenous background with few fibroblasts and islands of odontogenic epithelium |
|
|
Term
| Differential diagnosis of COF for small unilocular periradicular radiolucency |
|
Definition
|
|
Term
| Differential diagnosis of COF for small unilocular radiolucency associated to impacted tooth |
|
Definition
|
|
Term
| Differential diagnosis of COF for multilocular radiolucencies |
|
Definition
| ameloblastoma, central giant cell L., OKC, ameloblastic fibroma, COC, central hemangioma, ABC |
|
|
Term
|
Definition
| Enucleation and curettage. Recurrence is uncommon |
|
|
Term
| Clinical features of cementoblastoma |
|
Definition
Age: 20- 30 yrs.
More common in posterior mandible
M=F
Cortical expansion and occasionally intermittent pain |
|
|
Term
| Where do you find cementoblastomas? |
|
Definition
|
|
Term
| Radiographic findings of cementoblastoma |
|
Definition
| Radiopacity surrounded by radiolucent rim associated with the root of a tooth |
|
|
Term
| Microscopic findings of cementoblastoma |
|
Definition
| Mass of mineralized cementum-like material with intervening vascularized stroma containing numerous large and hyperchromatic cementoblasts |
|
|
Term
| Differential diagnosis for cementoblastoma |
|
Definition
| Odontoma, hypercementosis, focal sclerosing osteomyelitis, osteoblastoma |
|
|
Term
| Treatment for cementoblastoma |
|
Definition
| Surgical extraction of the tooth along with the attached mineralized mass. No recurrence after complete removal |
|
|
Term
| Clinical features of odontoma |
|
Definition
Mean Age: 14 yrs
Most occur in the second decade
Compound odontoma more common in maxilla
Complex odontoma more common in mandible |
|
|
Term
| Where do you find compound odontoma? |
|
Definition
|
|
Term
| Where do you find complex odontoma? |
|
Definition
|
|
Term
| Radiographic features of compound odontoma |
|
Definition
Radiopacities with a tooth-like appearance surrounded by
a radiolucent rim |
|
|
Term
| Radiographic features of complex odontoma |
|
Definition
| Calcified mass with a radiolucent rim. |
|
|
Term
| Microscopic features of compound odontoma |
|
Definition
| Dental tissues displaying a tooth-like appearance (denticles) |
|
|
Term
| Microscopic features of complex odontoma |
|
Definition
| Dental tissues with a haphazard configuration |
|
|
Term
| Differential diagnosis for compound odontoma |
|
Definition
|
|
Term
| Differential diagnosis for complex odontoma |
|
Definition
| Osteoma, cementoblastoma, idiopathic osteosclerosis, ossifying fibroma, calcifying odontogenic tumor, ABC |
|
|
Term
|
Definition
|
|
Term
| Clinical features of ameloblastic fibroma |
|
Definition
Age: First two decades of life
M=F
70% occur in the mandible
Small tumors are asymptomatic
Large tumors produce expansion
75% of cases are associated with an unerupted tooth |
|
|
Term
| Where do you find ameloblastic fibromas? |
|
Definition
|
|
Term
| Radiographic features of ameloblastic fibromas |
|
Definition
| Unilocular (small) or multilocular (large) radiolucencies with well defined sclerotic borders |
|
|
Term
| Microscopic features of ameloblastic fibromas |
|
Definition
| Mesenchymal tissue with the appearance of dental papilla. In addition, cords of odontogenic epithelium composed of cuboidal to columnar basal cells |
|
|
Term
| Differential diagnosis of ameloblastic fibromas of typical demographics and radiographic pattern |
|
Definition
|
|
Term
| Differential diagnosis of ameloblastic fibromas of atypical demographics and radiographic pattern |
|
Definition
| Ameloblastoma, odontogenic myxoma, dentigerous cyst, OKC, central giant cell lesion, histiocytosis |
|
|
Term
| Treatment for ameloblastic fibroma |
|
Definition
Enucleation
Recurrences range from 0-43.5%
Aggressive surgical excision for recurrent lesions.
Ameloblastic fibrosarcoma may arise de novo or in a recurrent ameloblastic fibroma |
|
|
Term
| Clinical features of ameloblastic fibro-odontoma |
|
Definition
Mean age= 10 yrs.
M=F
Most occur in the posterior mandible
Asymptomatic
Large tumors produce expansion
Most cases are associated with an unerupted tooth |
|
|
Term
| Where do you find ameloblastic fibro-odontoma |
|
Definition
|
|
Term
| Radiographic features of ameloblastic fibro-odontoma |
|
Definition
| Unilocular or multilocular radiolucencies with well defined sclerotic borders and variable amounts of calcified material |
|
|
Term
| Microscopic features of ameloblastic fibro-odontoma |
|
Definition
| Identical to ameloblastic fibroma. In addition, calcified material consistent with dentin, enamel, and enamel matrix arranged in toothlike patterns or as haphazard masses |
|
|
Term
| Differential diagnosis of radiolucent ameloblastic fibro-odontoma |
|
Definition
| dentigerous cyst, myxoma, OKC, central giant cell lesion, ameloblastoma, histiocytosis |
|
|
Term
| Differential diagnosis of radiolucent/radiopaque ameloblastic fibro-odontoma |
|
Definition
| Calcifying epithelial odontogenic tumor, calcifying epithelial odontogenic cyst, odontoma, adenomatoid odontogenic tumor |
|
|
Term
| Treatment for ameloblastic fibro-odontoma |
|
Definition
Curettage. Recurrence is extremely rare after complete
removal |
|
|
Term
| Which tumor(s) are associated with the radiographic feature "soap bubble" pattern |
|
Definition
| odontogenic myxoma, ameloblastoma |
|
|
Term
| What is the most common odontogenic tumor? |
|
Definition
|
|
Term
| What is the second most common odontogenic tumor? |
|
Definition
|
|
Term
| If unilocular pericoronal radiolucency, what is the differential diagnosis? (think cysts and/or tumors) |
|
Definition
| Hyperplastic follicle, dentigerous cyst, OKC, ameloblastic fibroma, AOT, COC |
|
|
Term
| If unilocular radiolucency between roots, what is the differential diagnosis? (think cysts and/or tumors) |
|
Definition
| OKC, lateral periodontal cyst |
|
|
Term
| If multilocular radiolucency, what is the differential diagnosis? (think cysts and/or tumors) |
|
Definition
| Odontogenic myxoma, OKC, calcifying odontogenic cyst, ameloblastic fibroma, central giant cell L., ABC, central hemangioma |
|
|
Term
| Clinical features of squamous odontogenic tumors (SOT) |
|
Definition
Equal frequency of anterior maxilla and posterior mandible
Mean age = 40 yrs
Asymptomatic expansion
M=F
Multiple lesions: 20% of affected pts |
|
|
Term
| Microscopic features of SOT |
|
Definition
Dental lamina rests (rests of Serres)
Epithelial rests of Malaise
It appears to originate within the PDL
Islands of bland-appearing squamous epithelium with micro cyst formation |
|
|
Term
| Radiographic features of SOT |
|
Definition
| triangular radiolucent lesion |
|
|
Term
|
Definition
| Local excision or curettage |
|
|
Term
| What has scalloping? (tumors or cysts) |
|
Definition
| Odontogenic myxoma, traumatic bone cyst |
|
|
Term
| Recurrence rate of cementoblastoma |
|
Definition
| No recurrence (after complete removal) |
|
|
