ONCO-2 Flashcards
benign; slow-growing but locally invasive and persistent; does not metastasize
Ameloblastoma (Epithelial Tumor)
Description
typically form rounded & cyst - like radiolucency with moderately well-defined
margins and appear as multilocular - “soap bubble” or honeycomb appearance
Ameloblastoma (Epithelial Tumor)
Radiographic Feature
common to all subtypes is the palisading (fence-like) of columnar cells around
epithelial nests in a pattern similar to that of ameloblasts of enamel
Ameloblastoma (Epithelial Tumor)
Histopathology
The amyloid materials present characteristics annular (ringlike) staining pattern, called Liesegang rings
Calcifying Epithelial Odontogenic Tumor (CEOT)
Histopathology
presence of a radiopaque mass in the center of the lesion (black arrow) with radiopaque streaks has the appearance of
“driven snow” scattered flecks of calcification
Calcifying Epithelial Odontogenic Tumor (CEOT)
Radiographic
divergence of roots and displacement of teeth occurs more frequently than root resorption
Adenomatoid Odontogenic Tumor (AOT)
Radiographic
Rosettes and ductlike structure of columnar
epithelial cells surrounding small foci of calcification
Adenomatoid Odontogenic Tumor (AOT)
Histopathology
It forms cavity that is filled with semi solid or semi liquid substance a combination of cyst in a neoplastic growth
Odontogenic Keratocyst (OKC) or Keratocyst
Odontogenic Tumor
Description
The lining presents stratified squamous
epithelium with a parakeratinized surface
Odontogenic Keratocyst (OKC) or Keratocyst
Odontogenic Tumor
Histopathology
Made of fibrous connective tissue stroma scattered with islands of clear cells
Clear Cell Odontogenic Tumor (Carcinoma)
Histopathology
● Honeycomb - Multilocular (small)
● Tennis Racket - Triangular
● Soap Bubble - Big rounded
Odontogenic Myxoma
Radiographic Features
Fibroblast ( Spindle-shaped cells),stellate-shaped cells, and collagen fibers scattered in a mucoid substance
It has soft gelatinous consistency
Odontogenic Myxoma
Histopathology
Mucoid, Mucoid intercellular substance which contains scattered fibroublast (spindle shape) , Stellate shape cells
and Collagen Fibers (mucous tissue)
Odontogenic Myxoma
Purely radiolucent with well defined margins because of pure soft tissue tumor
containing small globules or islands of calcified deposit
Central Odontogenic Fibroma
Radiographic
Late stage - calcified deposit may be present (dentin or cementum)
Central Odontogenic Fibroma
Histopathology
(Early Stage)
- Well defined radiolucency with sclerotic margin ( in histopath you can see cementoblast and osteoblast )
(Middle Stage)
- Globules or calcified deposit would appear as spots and radiopaque structure
Cementifying Fibroma Ossifying Fibroma
Radiographic
Tumor that arises in cementoblast
Cementoblastoma (True Cementoma)
Description
Reactive lesion rather than neoplastic growth
Unusually responds to unknown factor
Periapical Cemento-Osseous Dysplasia
Description
Calcified deposits:
Trabeculae, Ovoid, Spicules or irregular masses
Periapical Cemento-Osseous Dysplasia
Histopathology
Tennis racket
Odontogenic Myxoma
Signs and Symptoms:
● slow clinical growth and does not tend to infiltrate between trabeculae of bone;
Ameloblastic FIbroma (Mixed Tumor)
Clinical Features
well circumscribed and usually are surrounded by a sclerotic margin
Ameloblastic FIbroma (Mixed Tumor)
Radiographic Features
because of tumor encapsulation and the
general lack of invasive capacity, this lesion is treated through a conservative surgical
procedure such as curettage or excision.
Ameloblastic FIbroma (Mixed Tumor)
Treatment
Are the benign tumors, which may occur anywhere in the body
Teratomas
