robbypowell's version from 2017-04-13 13:48

unilocular lesions

Question Answer
what is the most common unilocular radiographic lesion?Dentigerous cyst
what are the 3 most common sites for a dentigerous cyst in order of most common to least common?Third molars > max canines > mand 2nd premolar
dentigerous cysts are most commonly found in 3rd molars, max canines and mandibular 2nd premolars... what these sites?i. Common bc these are most likely to be impacted due to being last tooth to erupt in that sextant
Dentigerous cyst that is <5 mm is called a _____ ______hyper plastic follicle
in order for a dentigerous cyst to be considered a dentigerous cyst... how big must it be?1 cm
recommended tx for dentigerous cystmarsupialization
unilocular lesion with shiny glistening lining... is it a dentigerous cyst or an odontogenic keratocyst?dentigerous cyst (OKC has lots of keratin)
term for Dentigerous Cyst surrounding the crown of tooth that erupted through bone but NOT the overlying soft tissue; may be associated with hemorrhage or hematoma .... impaction due only to soft tissueEruption cyst (hematoma)
what is the 2nd most common unilocular radiographic lesion?odontogenic keratocyst
t/f: dentigerous cysts have a high rate of recurrence and aggressive development due to genetic mutations in the cyst liningFalse (this is describing odontogenic keratocyst)
30% of Sporadic OKC's and 90% of Syndromic OKC's show mutation in ______ genePtch1 (sonic hedgehog signaling pathway on chromosome 9)
what type of gene is PTCH1?Tumor Inhibitor
odontogenic keratocysts develop from what part of developing tooth?rests of dental lamina (malasseiz?)
(OKC's or DC's) associated with Nevoid Basal Cell Carcinoma aka Gorlin GotzOKC
OKC's are known for having _____ bordersScalloped (into space between teeth)
What radiographic jaw lesion is considered the great mimicker because it can look like so many others?OKC
Will OKC's expand bone?No, stays within cortical plate
Cyst that looks like a fibrous capsule with columnar cell nuclei parallel to each other... also known for "daughter cysts" leading to recurrenceOKC
Bifid rib, Palmar and plantar pits, hyperkaratosis, hypertelomerism, and calcification of the fall cerebri are all signs of what syndrome? what would you expect to find on a radiograph of the jaws?Nevoid Basal Cell Carcinoma (gorlin gotz syndrome) (ptch gene mutation)
what are the 3 most common features of Nevoid Basal Cell syndrome?multiple bcc's, multiple okc's, bifid rib
t/f: african american nevoid basal cell patients do not have multiple okc'strue
okc's recur in ___ to ___% of cases20-60%
this type of unicystic lesion resembles DC when associated with impacted tooth
Question Answer
where are developmental lateral periodontal cysts found (2 sites) (aka gingival cyst of adult aka botryoid odontogenic cyst)a. Between roots of mand PM (2/3 of cases) and between max lateral/canine (1/3 cases)