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OPT Cysts

TermDefinition
dentigerous cysts cyst that arises from lining of follicular epithelium around the crown of an impacted tooth, most common developmental cyst; causes bone expansion, swelling, and misplaced teeth
eruption cyst soft-tissue version of dentigerous cyst; blue-purple mass above erupting teeth
odontogenic keratocyst (OKC) cyst that arises from rests of dental lamina aka {keratocystic odontogenic tumor}; large growth potential, high recurrence rate and associated with {Nevoid Basal Cell Carcinoma} -does not create a bony expansion, diagnosis based on microscopic features
Nevoid Basal Cell Carcinoma (Gorlin syndrome) mutation of {PTCH (patched) gene}, tumor suppressor gene; basal cell carcinomas of skin, OKC of jaws, bifid ribs, calcification of falx cerebri -palmar/plantar pitting, ovarian cysts, medulloblastoma
palmar/plantar pitting pits of palms and soles, from fruste of basal cell carcinoma; seen in Nevoid Basal Cell Carcinoma
primordial cyst cyst that develops where tooth should have been; probably an OKC
orthokeratinized odontogenic cyst like an OKC but lower recurrence and develops with impacted tooth
gingival cyst of the newborn small, superficial keratin-filled cyst on alveolar ridge of infant
gingival cyst of the adult small swelling of attached gingiva, blue/gray in colon in lower premolar/canine area; may cause cupping of underlying bone
lateral periodontal cyst occur between roots of vital teeth (lateral radicular cyst are nonvital); most in lower premolar/canine area
botryoid odontogenic cyst (BOC) multi compartment variant of lateral periodontal cyst; grape-like cluster of cysts
calcifying odontogenic cyst (Gorlin cyst) cyst with cystic and solid variants; has unique eosinophilic cells lacking nuclei that can calcify, called {ghost cells}
dentinogenic ghost cell tumor solid variant of calcifying odontogenic cyst
ghost cells unique eosinophilic cells without nuclei that can calcify in calcifying odontogenic cysts
glandular odontogenic cyst gland-like differentiation with significant recurrence rate, in anterior mandible or upper canine
buccal bifurcation cyst inflammatory cyst on buccal of lower first molar, sometimes with enamel projection
paradental cyst specific type of buccal bifurcation cyst associated with partially erupted third molars with pericoronitis
1. de novo from remnants of dental lamina 2. malignant transformation of ameloblastoma 3. lining of odontogenic cysts carcinoma arising in odontogenic cysts arise from:
ameloblastoma 2nd most common neoplasm after odontoma; most are solid/multicystic type (conventional) that produces painless expansion of the jaw with radiographic "soap bubble" appearance with an impacted tooth
follicular type most common conventional ameloblastoma; islands of epithelium that look like developing enamel, can undergo cystic change
plexiform type conventional type of ameloblastoma, seen more in maxilla; cells in sheets
acanthomatous type conventional type of ameloblastoma, like follicular cyst but with squamous differentiation
granular cell type conventional ameloblastoma that sometimes has eosinophilic cells
desmoplastic type conventional ameloblastoma with mixed radiographic lesion
basal cell type least common conventional ameloblastoma, resembles basal cell carcinoma of skin
unicystic ameloblastoma ameloblastoma seen in young people that mimics dentigerous cysts; {luminal, intraluminal, and mural types}
peripheral ameloblastoma ameloblastoma that develops from dental lamina or basal layer of gingiva; small, fibroma-like mass on gingiva
malignant ameloblastoma neoplasm with same features of ameloblastoma but metastasized to lymph node or lung
ameloblastic carcinoma ameloblastoma with cytologic features of malignancy in primary tumor
clear cell odontogenic carcinoma tumors of nests and cords of clear cells much like muco-ep, mostly in mandible
adenomatoid odontogenic tumor tumor in anterior mandible associated with unerupted canines, sometimes contains 'snowflake' calcifications with thick capsule
calcifying epithelial odontogenic tumor (Pindborg tumor) tumor that forms amyloid-like product that can calcify and form rings {Liesegang ring calcification}; cells look like stratum intermedium
Liesegang ring calcification amyloid-like product that can calcify and form rings in calcifying epithelial odontogenic tumor
squamous odontogenic tumor tumor from epithelial rests of Malassez so must associate with roots; epithelial islands with micro cysts
odontoma most common odontogenic tumor, associated with unerupted teeth
compound odontoma multiple, small tooth-like structures in anterior maxilla
complex odontoma odontoma with haphazard arrangement of dental soft tissue, can be large and usually in posterior
ameloblastic fibroma true neoplasm of odontogenic epithelium and ectomesenchyme associated with unerupted teeth
ameloblastic fibro-odontoma mixed tumor of odontoma and ameloblastic fibroma associated with unerupted teeth in posterior mandible
ameloblastic fibrosarcoma CT component exhibits cellular malignancy, often arises from ameloblastic fibroma
odontoameloblastoma neoplasm of combination of odontoma and ameloblastoma
odontogenic myxoma jaw tumor, gelatinous mass when excised; radiograph looks like spider web
central odontogenic fibroma tumor with palatal depression, blind-ended fistula or cleft; can resorb roots
peripheral odontogenic fibroma soft tissue counterpart of central odontogenic fibroma but more common; pink mass on mandibular gingiva can include cementoid-like calcifications
granular cell odontogenic tumor less than 50 cases of this odontogenic tumor reported
cementoblastoma identical to osteoblastoma but on roots of teeth
Created by: aharnold