Atypical case of periapical adenomatoid odontogenic tumour

Abstract

The Adenomatoid Odontogenic Tumour (AOT) is a progressively growing asymptomatic benign non-invasive lesion. A rare subvariant of the extrafollicular type of AOT may mimic periapical disease radiographically. We report a 45-year-old male with a periapical radiolucent lesion affecting maxillary central incisor tooth. Initially suspicious of periapical pathology, although clinical findings seemed to indicate a nonendodontic cause. The lesion was surgically explored and histopathological examination revealed the presence of AOT. This particular subvariant is very rare indeed, as available literature only 8 cases have been reported.

Adenomatoid Odontogenic Tumor Associated with an Impacted Maxillary Lateral Incisor: A Case Report with Five-Year Follow-Up

“…The term “adenomatoid odontogenic tumor” proposed by Philipsen et al [ 2 ] indicates that it was not a variant of ameloblastoma [ 2 , 3 ]. In the World Health Organization classification of odontogenic tumors established in 1971, AOT was mentioned [ 1 , 4 ] as a mixed odontogenic neoplasm, in other words, an epithelial tumor with an inductive effect on the odontogenic mesenchyme [ 1 , 5 ].…”

“…Peripheral type (3%) usually presents as a gingival swelling and often appears as small, sessile masses on the buccal maxillary gingiva. Clinically, these lesions cannot be differentiated from the common gingival fibrous lesion [ 3 , 4 ].…”