Odontogenic cyst

Odontogenic cyst are a group of jaw cysts that are formed from tissues involved in odontogenesis (tooth development). Odontogenic cysts are closed sacs, and have a distinct membrane derived from rests of odontogenic epithelium. It may contain air, fluids, or semi-solid material. Intra-bony cysts are most common in the jaws, because the mandible and maxilla are the only bones with epithelial components. That odontogenic epithelium is critical in normal tooth development. However, epithelial rests may be the origin for the cyst lining later. Not all oral cysts are odontogenic cyst. For example, mucous cyst of the oral mucosa and nasolabial duct cyst are not of odontogenic origin.
In addition, there are several conditions with so-called (radiographic) 'pseudocystic appearance' in jaws; ranging from anatomic variants such as Stafne static bone cyst, to the aggressive aneurysmal bone cyst.[1]

Classification[2]
Relative incidence of odontogenic cysts.[3]

Cystic neoplasm

Most cysts in the body are benign (dysfunctional) tumors, the result of plugged ducts or other natural body outlets for secretions. However, sometimes these masses are considered neoplasm:

Diagnosis
Cholesterol clefts in a periapical (radicular) cyst.

On histopathology, cholesterol clefts indicate mainly a periapical (radicular) cyst[4] or an inflamed dentigerous cyst.[5]

Treatment

Treatment ranges from simple enucleation of the cyst to curettage to resection. For example, small radicular cyst may resolved after successful endodontic ("root-canal") treatment. Because of high recurrence potential and aggressive behaviour, curettage is recommended for keratocyst. However, the conservative enucleation is the treatment of choice for most odontogenic cysts. The removed cyst must be evaluated by pathologist to confirm the diagnosis, and to rule out other neoplastic lesions with similar clinical or radiographic features (e.g., cystic or solid ameloblastoma, central mucoepidermoid carcinoma).[6] There are cysts, e.g. buccal bifurcation cyst with self-resolation nature, in which close observation can be employed unless the cyst is infected and symptomatic.[7]

See also

References
  1. Zadik, Yehuda; Aktaş Alper; Drucker Scott; Nitzan W Dorrit (2012). "Aneurysmal bone cyst of mandibular condyle: A case report and review of the literature". J Craniomaxillofac Surg. 40 (8): e243–8. doi:10.1016/j.jcms.2011.10.026. PMID 22118925.
  2. Shear, Mervyn; Speight, Paul (2007). Cysts of the oral and maxillofacial regions (4th ed.). Oxford: Blackwell Munksgaard. ISBN 978-14051-4937-2.
  3. Leandro Bezerra Borges; Francisco Vagnaldo Fechine; Mário Rogério Lima Mota; Fabrício Bitu Sousa; Ana Paula Negreiros Nunes Alves (2012). "Odontogenic lesions of the jaw: a clinical-pathological study of 461 cases". Revista Gaúcha de Odontologia. 60 (1).
  4. Annie S. Morrison; Kelly Magliocca. "Mandible & maxilla - Odontogenic cysts - Periapical (radicular) cyst". Pathology Outlines. Topic Completed: 1 March 2014. Revised: 13 December 2019
  5. Kelly Magliocca; Annie S. Morrison. "Mandible & maxilla - Odontogenic cysts - Dentigerous". Pathology Outlines. Topic Completed: 1 October 2013. Revised: 2 December 2019
  6. Pou, Anna. "Odontogenic cysts and tumors". UTMB Department of otolaryngology. Archived from the original on 23 August 2012. Retrieved 11 September 2012.
  7. Zadik Y, Yitschaky O, Neuman T, Nitzan DW (May 2011). "On the Self-Resolution Nature of the Buccal Bifurcation Cyst". J Oral Maxillofac Surg. 69 (7): e282–e284. doi:10.1016/j.joms.2011.02.124. PMID 21571416.
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