Benign Odontogenic Tumours Flashcards

1
Q

Origin of odontogenic tumours?

A

Epithelial

Mesenchymal

Mixed

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2
Q

What is ameloblastoma?

A

Benign epithelial neoplasm
- slow growing
- locally invading
- high rate of recurrence

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3
Q

Clinical features of amelobalstoma?

A

80% posterior body of mandible
- asymptomatic or
- swelling of the jaw

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4
Q

Radiographic feature of ameloblastoma?

A

Unli / multilocular radiolucency resembling a cyst
- occasionally scalloped borders
- knife edge resorption of roots of adjacent teeth

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5
Q

Histopathology of ameloblastoma?

A

Either follicular or plexiform

Follicular
- islands of odontogenic epithelium embedded in a fibrous stroma
- stellate reticulum appearance
- cystic changes
- ameloblasts like cells

Plexiform
- ameloblasts like cells
- fibrous tissue
- stellate reticulum like tissue
- anastamosing basal cells

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6
Q

What is CEOT?

Histo?

A

Calcifying epithelial odontogenic tumour

  • locally invasive neoplasm
  • amyloid tissue that may become calcified

Variable foci of calcification

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7
Q

What is AOT?

A

Adenomatoid odontogenic tumour

  • benign neoplasm
  • intra osseous
  • associated with unerupted maxillary canines
  • resembles dentigerous cyst
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8
Q

‘ red flag signs of odontogenic carcinoma / sarcoma? ‘

A

Extensive bone destruction

Mobile teeth

Non-healing tooth socket

Mucosal ulceration

Parasthesia / anaesthesia of trigeminal nerve

Lymphadenopathy

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9
Q

What is ameloblastic carcinoma?

A

Malignant neoplasm
- highly invasive and metastasis to lymph nodes

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