AAPD- ORAL PATHOLOGY QUESTIONS & ANSWERS
Radiopaque, well defined well localized non-corticated located at apex of vital teeth
No root resorption of teeth displacement - answer -idiopathic bone sclerosis
Simple bone cyst (4) - answer -not a true cyst
Mandible, posterior
No effect on surrounding teeth (hallmark)
Lamina dura intact, vital teeth
Replacement of normal bone with fibrous tissue- orange peel or ground glass
appearance of bone
Solitary or multiple, asymptomatic - answer -fibrous dysplasia
Replacement of normal bone with fibrous and cementum-like material, mixed rl and ro
near apices of teeth, females 9:1 - answer -focal cemnto-osseous dysplasia
Radiolucent, well-defined, corticated, localized to non-vital tooth - answer -radicular
cyst
Second primary molars, well-defined radiolucency corticated around roots of involved
teeth - answer -buccal bifurcation cyst
Radiolucency around unerupted tooth, continuous with cej, well defined - answer -
dentigerous cyst
What are the 2 other things that should be in a differential for a dentigerous cyst? -
answer -odontogenic keratocyst (kot/okc)
Cystic ameloblastoma
Main difference between dentigerous cyst to okc - answer -okc is above ian
(dentigerous can go blow)
Well defined, corticated, radiolucency in maxillary anterior between incisors,
occasionally causes roots of incisors to diverge or root resorption - answer -
nasopalatine duct cyst (heart shaped)
Homogenous radiolucent with radiopaque foci (snowflakes) area around maxillary
canines - answer -adenomatoid odontogenic tumor
What are the 3 most common radiographic findings in posterior mandible - answer -
dentigerous cyst
Okc
, Ameloblastic fibroma
Homogenous radiolucency, late cortical expansion, may cause displacement of teeth,
can be multiocular - answer -ameloblastic fibroma
Radiopacity with radiolucencies throughout and thin surrounding radiolucency (golf ball)
- answer -complex odontoma (different version of compound odontoma)
Well defined, radiopacity with thin radiolucent band within corticated border consistent
with apex of tooth, often painful but unrelated to vitality of tooth - answer -benign
cementoblastoma
Periosteal reactions causing sunray appearance - answer -ewing sarcoma
3 most common radiographic changes in patients with all - answer -ill defined rl/ro
areas
Displacement of unerupted teeth
Premature loss of teeth
What is the differential for all? - answer -hypophosphatasia (both have early exfoliation
of primary teeth)
Epstein's pearls vs bohn's nodules vs dental lamina cysts/gingival cyst of newborn -
answer -epstein's pearls
- arise from epithelium trapped during palatal fusion
- most common location- palatal midline
Bohn's nodules
- arise from epithelium from development of minor salivary gland
- location- buccal or lingual surfaces of alveolar ridge (not crest) or away from midline of
palate
Dental lamina cyst
- keratin filled cyst
- alveolar crest (most commonly max)
Rapid growing mass on anterior maxilla
What is the test? - answer -melanotic neuroectodermal tumor of infancy
Urine test (high urinary excretion of vanillyl- mandelic-acid
Congenital epulis- most common location?? - answer -alveolar ridge of newborn (most
common maxilla, most common females)
Radiopaque, well defined well localized non-corticated located at apex of vital teeth
No root resorption of teeth displacement - answer -idiopathic bone sclerosis
Simple bone cyst (4) - answer -not a true cyst
Mandible, posterior
No effect on surrounding teeth (hallmark)
Lamina dura intact, vital teeth
Replacement of normal bone with fibrous tissue- orange peel or ground glass
appearance of bone
Solitary or multiple, asymptomatic - answer -fibrous dysplasia
Replacement of normal bone with fibrous and cementum-like material, mixed rl and ro
near apices of teeth, females 9:1 - answer -focal cemnto-osseous dysplasia
Radiolucent, well-defined, corticated, localized to non-vital tooth - answer -radicular
cyst
Second primary molars, well-defined radiolucency corticated around roots of involved
teeth - answer -buccal bifurcation cyst
Radiolucency around unerupted tooth, continuous with cej, well defined - answer -
dentigerous cyst
What are the 2 other things that should be in a differential for a dentigerous cyst? -
answer -odontogenic keratocyst (kot/okc)
Cystic ameloblastoma
Main difference between dentigerous cyst to okc - answer -okc is above ian
(dentigerous can go blow)
Well defined, corticated, radiolucency in maxillary anterior between incisors,
occasionally causes roots of incisors to diverge or root resorption - answer -
nasopalatine duct cyst (heart shaped)
Homogenous radiolucent with radiopaque foci (snowflakes) area around maxillary
canines - answer -adenomatoid odontogenic tumor
What are the 3 most common radiographic findings in posterior mandible - answer -
dentigerous cyst
Okc
, Ameloblastic fibroma
Homogenous radiolucency, late cortical expansion, may cause displacement of teeth,
can be multiocular - answer -ameloblastic fibroma
Radiopacity with radiolucencies throughout and thin surrounding radiolucency (golf ball)
- answer -complex odontoma (different version of compound odontoma)
Well defined, radiopacity with thin radiolucent band within corticated border consistent
with apex of tooth, often painful but unrelated to vitality of tooth - answer -benign
cementoblastoma
Periosteal reactions causing sunray appearance - answer -ewing sarcoma
3 most common radiographic changes in patients with all - answer -ill defined rl/ro
areas
Displacement of unerupted teeth
Premature loss of teeth
What is the differential for all? - answer -hypophosphatasia (both have early exfoliation
of primary teeth)
Epstein's pearls vs bohn's nodules vs dental lamina cysts/gingival cyst of newborn -
answer -epstein's pearls
- arise from epithelium trapped during palatal fusion
- most common location- palatal midline
Bohn's nodules
- arise from epithelium from development of minor salivary gland
- location- buccal or lingual surfaces of alveolar ridge (not crest) or away from midline of
palate
Dental lamina cyst
- keratin filled cyst
- alveolar crest (most commonly max)
Rapid growing mass on anterior maxilla
What is the test? - answer -melanotic neuroectodermal tumor of infancy
Urine test (high urinary excretion of vanillyl- mandelic-acid
Congenital epulis- most common location?? - answer -alveolar ridge of newborn (most
common maxilla, most common females)
