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67 Cards in this Set

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All of the cysts are odontogenic except this one, what is it, and what is it classified as?
the nasopalatine duct cyst; nonodontogenic (also there is a cyst-like lesion called a simple bone cyst)
characteristics of an odontogenic keratocyst
non-inflammatory, arises from dental lamina, has benign tumor growth potential, epithelial lining is keratinized, contains a viscous/cheesy material (keratin) derived from the epithelium
DD for lateral periodontal cyst?
small OKC, mental forament, radicular cyst at accessory pulp canal
DD for odontogenic keratocyst?
simulates other RL lesions like dentigerous cyst and other multilocular lesions
DD for SBC:
cysts, especially OKC
Define "residual cyst"
a cyst that remains after incomplete removale of the original cyst
Effects on surrounding tissues of nasopalatine duct cyst?
Divergence of roots of CI, occasional root resorption, expansion and displacement
how do you manage a nasopalatine duct cyst?
enucleate from palatal side to aviod the nasopalatine nerve
how do you manage an SBC?
conservative opening into the lesion and curattage; this initiateds bleeding and subsequent healing.
Radiographic features of a nasopalatine duct cyst?
NP canal or foramen; anterior between CI's; divergence of roots may be caused; expands posteriorly to the hard palate; corticated; RL interior
Radiographic features of SBC?
almost all occur in mandible; often in ramus or posterior; well defined to ill-defined that blends into surrounding bone; shape is smooth and curved like a cyst with a oval or scalloped border; RL interior, may appear multilocular
T/F the dentigerous cyst never gets very large
False, it has the potential to grow very large if left untreated
T/F the dentigerous cyst can be eccentric and develop from lateral aspects of the follicle, instead of above the crown
True
t/f the odontogenic keratocyst grows along the internal aspect of the jaws with maximal expansion, which usually occurs in ramus area
false; minimal expansion...may cause perforation of the cortex and can displace/resorb structures
what are some characterisics of the SBC?
A cavity within bone that is line by CT; no epithelial lining; not a true cyst; may be empty or fluid filled; etiology is unknown: may be localized aberration in normal bone remodeling or metabolism
what are some characteristic of an eruption cyst?
odontogenic, with histological features of a dentigerous cyst that surrounds a tooth that has erupted through bone, but not soft tissue.
what are some clinical features of the SBC?
relatively common; 2nd decade; male predominance; asymptomatic (discovered by chance on radiograph); occassional pain/discomfort; expanision of jaws and tooth displacement; teeth are vital; multiple SBC's my develop in cemento-osseous dysplasia
what are some synonyms for the simple bone cyst (SBC)
traumatic bone cyst; hemorrhagic bone cyst; solitary bone cyst
what are the characterisics of a dentigerous or follicular cyst?
forms around the crown of an unerupted tooth; fluid accumulation b/w crown and epithelium; eruption cyst is soft tissue counterpart or variant of the dentigerous cyst that occurs close to the alveolar crest
what are the characteristics of a lateral periodontal cyst?
Arise from epithelial rests in peridontium lateral to the root; unicystic/unilocular; Asymptomatic, less than 1cm in diameter; no sexual predilection, wide age distribultion (2-9th decades), may become lateral PD abscess
what are the characteristics of basal cell nevus syndrome (Gorlin-Golz Syndrome)?
Appears early in life b/w ages of 5 and 30; skin abnormalities; skeletal abnormalities (bifid ribs); CNS abnormalities (calclification of falx cerebri); multiple cystic lesions of the jaw
what are the clinical features of a dentigerous cyst?
2nd most common cyst around the crown of an unerupted tooth; occurs in 1st-2nd decade; missing tooth; slow-growing; hard swelling, facial asymmetry; typically no pain
what are the clinical features of a nasopalatine duct cyst?
4-6th decade; 3X greater occurance in males; asymptomatic; small, well-defined, fluctuant swelling posterior to palatine papilla, can expand= salty fluid; burning sensation may be reported due to pressure on adjacent nasopalatine nerves
what are the clinical features of a residual cyst?
Asymptomatic; often discovered in an edentulous region; may show expansion; may be associated with pain in case of secondary infection
what are the clinical features of an odontogenic keratocyst?
1/10 of all jaw cysts; 2nd and 3rd decade with male predomination (3:2); may or may no arise from an unerupted tooth; no symptoms to mild swelling; pain with 2' infection; high recurrance due to satelline cysts of fragements left behind
what are the effectos on surrounding tissue with an SBC?
no effects in most cases; often lesion involves all the bone around the roots, but leaves the LD intact; minimum expansion along the axis of the bone
what are the most commonly effected teeth for a dentigerous cyst?
3rd Molars and Maxillary Canines
what are the radiographic features of a dentigerous cyst?
Pericoronal; well-defined cortex with a curved or circular outline; RL interior; attaches at CEJ; can displace and resorb adjacent teeth; can expand outer cortical boundry of the involved jaw
what are the radiographic features of a lateral periodontal cyst?
75% develop in the mandible, mostly extedning from CI to 2PM, corticated, round/oval; RL; may effect LD of adjacent tooth or displacement of adjacent teeth
What are the radiographic features of a residual cyst?
Occurs in both arches; slightly more often in the mandible; epicenter is located in PA region, in mandible, above the IAC; oval or round; of variable size; periphery may be corticated
what are the radiographic features of an odontogenic keratocyst?
common is posterior mandible; 90% occur posterior to canines, and 50% occur in ramus; epicenter is above the IAC; corticated, resembles other cysts; RL interior, uni or multilocular with curved septa
what are the synonyms of a nasopalatine duct cyst?
NP canal cyst, incisive canal cyst, median palatine cyst
what characteristic effects does a residual cyst have on surrounding tissues?
may cause tooth displacement or resorption; expansion or displacement of structres.
what characteristic internal structure does a residual cyst have?
RL; may have dystrophic calcifications in long standing cases
what is a good DD for a dentigerous cyst?
Hyperplastic follicle if less than 5mm in diameter; odontogenic keratocyst
what is reported to arise from the cyst lining of a dent. cyst?
squamous cell carcinoma
what is the eruption cyst clinically visible as?
a soft fluctuant mass on the alveolar ridges; blue to dark red due to blood in the cystic fluid.
what is the normal tx for a dentigerous cyst?
surgical removal; enucleantion and removal of tooth if indicated. Needle aspiration may reveal straw-colored fluid, takes 3-12 months to resolve
what is the typical DD for a nasopalatine duct cyst?
large incisive formen (if less than 6mm), or a redicular cyst
what is the typical management for a LPC?
excisional biopsy or enucleation; do not tent to recur
what is the typical management of an odontogenic keratocyst?
accurate determination of borders using advanced imaging, surgical resection, curettage or marsupialization to reduce size before excision, periodic post tx and radiographic exam, recurrance is usually within 5 yrs.
what is the usual cause of a Nasopalatine duct cyst?
cystic degeneration of epithelial remnants
what is the usual tx for a residual cyst?
excision and histopathological exam; should be followed radiographically for recurrance; recurrance rate is low.
what is this?
Residual cyst (above the IAC, which is what the arrow is pointing to)
what type of lesion is this?
A residual cyst (mandibular arch)
where is the eruption cyst most common?
molars and canines
Dentigerous cyst
Identify
SBC
Identify
SBC
Identify
SBC
Identify
nasopalatine duct cyst
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nasopalatine duct cyst
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nasopalatine duct cyst
Identify
nasopalatine duct cyst
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residual cyst
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residual cyst
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nasopalatine duct cyst
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dentigerous cyst
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odontogenic keratocyst
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odontogenic keratocyst
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lateral periodontal cyst
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lateral periodontal cyst
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basal cell nevus 2' characteristics
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eruption cyst
Identify
characteristics of basal cell nevus syndrome
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odontogenic keratocyst
Identify
dentigerous cyst
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