EXTRAFOLICULAR ADENOMATOID TUMOR: A CASE REPORT

Abstract

Adenomatoid odontogenic tumor (AOT) is a relatively uncommon lesion, described as a benign neoplasm of ectodermal origin. It presents as a slow-growing lesion, and is often asymptomatic. It is uncommon in patients older than 30 years. Women are affected about twice as often as men. The extrafollicular variant is when the tumor is not associated with an included tooth, being in an interradicular position, causing, in most cases, root divergence. A 39-year-old male patient with an increase in volume in the lower premolar region, but otherwise asymptomatic, sought help. A radiolucent area was observed adjacent to the first and second lower premolars, in a triangular shape causing a divergence of these teeth without root resorption. Diagnostic hypotheses were AOT and squamous odontogenic tumor. An incisional biopsy was performed and confirmed the diagnosis of AOT. The lesion was submitted to enucleation surgery. After 1 year of follow-up, no signs of recurrence could be observed. Adenomatoid odontogenic tumor (AOT) is a relatively uncommon lesion, described as a benign neoplasm of ectodermal origin. It presents as a slow-growing lesion, and is often asymptomatic. It is uncommon in patients older than 30 years. Women are affected about twice as often as men. The extrafollicular variant is when the tumor is not associated with an included tooth, being in an interradicular position, causing, in most cases, root divergence. A 39-year-old male patient with an increase in volume in the lower premolar region, but otherwise asymptomatic, sought help. A radiolucent area was observed adjacent to the first and second lower premolars, in a triangular shape causing a divergence of these teeth without root resorption. Diagnostic hypotheses were AOT and squamous odontogenic tumor. An incisional biopsy was performed and confirmed the diagnosis of AOT. The lesion was submitted to enucleation surgery. After 1 year of follow-up, no signs of recurrence could be observed.