Adenomatoid odontogenic tumor

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Adenomatoid odontogenic tumor
Adenomatoid odontogenic tumor.jpg
Classification and external resources
ICD-O M9300/0

The adenomatoid odontogenic tumor is an odontogenic tumor[1] arising from the enamel organ or dental lamina.


It is fairly uncommon, but It is seen more in young people. Two thirds of the cases are found in females.[2]

Presentation and diagnosis[edit]

Two thirds of cases are located in the anterior maxilla, and one third are present in the anterior mandible.[3]

Two thirds of the cases are associated with an impacted tooth (usually being the canine).

On radiographs, the adenomatoid odontogenic tumor presents as a radiolucency (dark area) around an unerupted tooth extending past the cementoenamel junction.

It should be differentially diagnosed from a dentigerous cyst and the main difference is that the radiolucency in case of AOT extends apically beyond the cementoenamel junction.

Radiographs will exhibit faint flecks of radiopacities surrounded by a radiolucent zone.

It is sometimes misdiagnosed as a cyst.[4]


Treatment can involve enucleation.[5]


  1. ^ Nigam S, Gupta SK, Chaturvedi KU (2005). "Adenomatoid odontogenic tumor - a rare cause of jaw swelling". Braz Dent J. 16 (3): 251–3. doi:10.1590/S0103-64402005000300015. PMID 16429194. 
  2. ^ "Odontogenic tumors". Retrieved 2009-01-04. 
  3. ^ Nonaka CF, de Souza LB, Quinderé LB (2007). "Adenomatoid odontogenic tumour associated with dentigerous cyst--unusual case report". Rev Bras Otorrinolaringol (Engl Ed). 73 (1): 129–31. PMID 17505612. 
  4. ^ Handschel JG, Depprich RA, Zimmermann AC, Braunstein S, Kübler NR (August 2005). "Adenomatoid odontogenic tumor of the mandible: review of the literature and report of a rare case". Head Face Med. 1: 3. doi:10.1186/1746-160X-1-3. PMC 1266042Freely accessible. PMID 16270916. 
  5. ^ Vasconcelos BC, Frota R, Cardoso AB, Porto GG, Carneiro SC (2008). "Adenomatoid odontogenic tumor". Braz J Otorhinolaryngol. 74 (2): 315. PMID 18568215.