Canadian Medical Guide > Diseases > Neoplasms > Cysts > Bone Cysts > Jaw Cysts > Odontogenic Cysts Terms and Definitions

Odontogenic Cysts

Medical Definition:	Cysts found in the jaws and arising from epithelium involved in tooth formation. They include follicular cysts (e.g., primordial cyst, dentigerous cyst, multilocular cyst), lateral periodontal cysts, and radicular cysts. They may become keratinized (odontogenic keratocysts). Follicular cysts may give rise to ameloblastomas and, in rare cases, undergo malignant transformation.
Guide Notes:	non-neoplastic but calcifying odontogenic cyst = ODONTOGENIC CYST, CALCIFYING (neoplastic); /blood supply /chem /secret /ultrastruct permitted; coord IM with MANDIBULAR DISEASES or MAXILLARY DISEASES (IM)
Also Called:	Keratocysts

Odontogenic Cysts Categories.

	Basal Cell Nevus Syndrome - Hereditary disorder consisting of multiple basal cell carcinomas, odontogenic keratocysts, and multiple skeletal defects, e.g., frontal and temporoparietal bossing, bifurcated and splayed ribs, kyphoscoliosis, fusion of vertebrae, and cervicothoracic spina bifida. Genetic transmission is autosomal dominant.
	Dentigerous Cyst - Most common follicular odontogenic cyst. Occurs in relation to a partially erupted or unerupted tooth with at least the crown of the tooth to which the cyst is attached protruding into the cystic cavity. May give rise to an ameloblastoma and, in rare instances, undergo malignant transformation.
	Odontogenic Cyst, Calcifying - A mixed radiolucent-radiopaque lesion of the jaws with features of both a cyst and a solid neoplasm. It is characterized microscopically by an epithelial lining showing a palisaded layer of columnar basal cells, presence of ghost cell keratinization, dentinoid, and calcification. (Stedman, 25th ed)
	Periodontal Cyst - An epithelium-lined sac containing fluid; usually found at the apex of a pulp-involved tooth. The lateral type occurs less frequently along the side of the root.

Odontogenic Cysts Medical Definitions and Terms

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