Ameloblastoma

Ameloblastoma-Point study

*Ameloblastoma-odontogenic epithelial tissue origin

*Benign but can show malignant nature-diffuse metastasis

*Etiology-can occur due to Trauma, infection, extraction, Dentigerous cyst(mural ameloblastoma)

*Subtypes-unicystic,multicystic(solid),peripheral variants

Unicystic ameloblastoma-Unicystic ameloblastoma (UA) refers to those cystic lesions that show clinical, radiographic, or gross features of a cyst, but on histologic examination show a typical ameloblastomatous epithelium lining part of the cyst cavity, with or without luminal and/or mural tumor growth.

Peripheral ameloblastoma- Peripheral tumors are odontogenic tumors, with the histological characteristics of intraosseous ameloblastoma that occur solely in the soft tissues covering the tooth-bearing parts of the jaws.

Multicystic are more carcinogenic than unicystic ameloblastoma.

*C/F-common in mandible

Mostly involve posterior ramus area of jaw

Grow slowly and does not show any clinical features initially.

Usually patient comes with a complaint of facial assymetry and a large facial swelling.

Ameloblastoma can be associated with an impacted tooth.

Can cause pain, paresthesia and mobility of teeth can be seen

Expansion and distortion of cortical plates (egg shell crackling)

Sometimes larger lesion an perforate the corticla plate and can be seen as soft swelling over gingiva

Maxillary swellings can invade maxillary air sinuses

*Radiological features- Radiographically there can be unilocular or multilocular radiloucency.

Honey comb or Soap bubble appearance-This is due to the entrapment of normal bone within the tumour

Unicystic variant can also show multilocular radiloucency.