Odontogenic Tumors

Front 1

Ameloblastoma

Back 1

ook like ameloblasts - cells look like islands of developing teeth, loosely arranged and stellate reticulum appearance, reverse nuclear polarization, posterior mandible 2/3rds of cases, mostly teenagers and young adults, benign, slow growing, but locally aggressive (most malignant benign tumor known), radiographically are loculated, big problem is recurrence, pattern type (listed below) does not make a difference for treatment and prognosis

Front 2

Plexiform Pattern

Back 2

ribbon like strand of epithelium with interconnecting pattern

Front 3

Acanthomatous Pattern

Back 3

squamous change occurs within stellate reticulum area

Front 4

Basal Cell Pattern

Back 4

look similar to BCC

Front 5

Desmoplastic Ameloblastoma

Back 5

dense CT found in this pattern making for difficult diagnosis

Front 6

Unicystic Ameloblastoma

Back 6

composed of one large cystic space - many ameloblastomas start off as this and then grow - if caught before it grows then better prognosis

Front 7

Peripheral Ameloblastoma

Back 7

clinically occur as gingival mass (looks like fibroma or pyogenic granuloma) but microscopically is an ameloblastoma - no bone involvement, lower recurrence rate than bony counterparts

Front 8

Malignant Ameloblastoma

Back 8

starts off as a conventional ameloblastoma in the mandible and for whatever reason happens to metastasize

Front 9

Ameloblastic Carcinoma

Back 9

very rare diagnosis, describes tumors that look like ameloblatomas but are malignant - much more pleomorphism and cellular crowding

Front 10

Clear Cell Odontogenic Carcinoma

Back 10

mainly occur in the mandible, cells have clearing of cytoplasm making them appear clear, and tend to metastasize to either local lymph nodes or the lungs

Front 11

Adenomatoid Odontogenic Tumor

Back 11

looks similar to a gland like structure but it is not, tend to occur in the anterior jaw, more frequently in maxilla, often present in a dentigerous location, make microscopic calcifications (sometimes seen on radiographs), involve entire tooth an extend apically along root, thickly encapsulated and shell out quite easily, benign and recurrence very rare

Front 12

Calcifying Epithelial Odontogenic Tumor

Back 12

pretty rare, tend to occur in posterior mandible, can be localized small tumors but sometimes become much larger, hallmark of these cells microscopically is they produce a very eosinophilic amyloid which calcifies and can be picked up radiographically

Front 13

Ameloblastic Fibroma

Back 13

occur in posterior ramus of mandible and often associated with an impacted tooth, combo of epithelium with abundant storm (loose CT makes up a lot of the tumor)

Front 14

Ameloblastic Fibro-odontoma

Back 14

see this tumor much more frequently, differentiates to point where tooth structure is in tumor, occur in posterior ramus of mandible, mainly found in children, if caught early might just look like ameloblastic fibroma, so tooth structure formation is differentiating factor

Front 15

Odontoameloblastoma

Back 15

ameloblastoma that happened to be associated with an odontoma

Front 16

Compound Odontoma

Back 16

tend to be in anterior areas of jaws, structures look like little tiny teeth forming in lesions, just developmental anomalies and after removal should not recur

Front 17

Complex Odontoma

Back 17

big mass of tooth structure not organized like it should be, tend to occur in posterior areas of jaws, if caught early is diagnosed as ameloblastic fibro-odontoma

Front 18

Odontogenic Fibroma

Back 18

found all over, fibrous (rather than loose CT of ameloblastic fibroma), more epithelial component to it, benign but tend to recur after local curettage, can occur peripherally in soft tissues (then called peripheral odontogenic fibromas)

Front 19

Odontogenic Myxoma

Back 19

composed of very loose CT with a lot of ground substance, clinically look gelatinous, are slimy and hard to clean out, radiographically see trabeculation (fine and whispie)

Front 20

Cementoblastoma

Back 20

radiographically looks like radiopaque mass attached to the roots of the tooth, benign neoplasm but 1/3rd of them recur