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Primordial odontogenic tumour: A systematic review of the common but also unusual features of this novel entity - 02/04/20

Doi : 10.1016/j.jormas.2020.02.008 
L. Azzi a, , L. Tettamanti b, A. Di Francesco c, M.P. Cerati d, A. Tagliabue a, D. Farronato a, V. Maurino b
a Unit of Oral Medicine and Pathology, ASST dei Sette Laghi–Ospedale di Circolo, Department of Medicine and Surgery, University of Insubria, 10, via G. Piatti, 21100 Varese, Italy 
b Unit of Pediatric Dentistry, ASST dei Sette Laghi–Ospedale di Circolo, Department of Medicine and Surgery, University of Insubria, Varese, Italy 
c Unit of Pediatric Maxillofacial Surgery, ASST Lariana–Ospedale Sant’Anna, Department of Medicine and Surgery, University of Insubria, Como, Italy 
d Unit of Pathological Anatomy, ASST dei Sette Laghi–Ospedale di Circolo, Varese, Italy 

Corresponding author.
Sous presse. Épreuves corrigées par l'auteur. Disponible en ligne depuis le Thursday 02 April 2020

Abstract

Background

Primordial odontogenic tumour (POT) is a novel entity that was described in 2014 and that is included in the group of benign mixed epithelial and mesenchymal odontogenic tumours. In recent years, several papers have added new cases with some clinical and histopathological aspects that slightly differ from those described in the original report. The aim of this systematic review is to update all available data on POT published in the literature and to identify those features of the neoplasm that require further investigation.

Materials and methods

A systematic review of literature was conducted using PubMed, Embase, Web of Science and Scopus. Additional sources were also checked. Publications reporting cases with enough clinicopathological information were included, without any time or language restrictions. Histopathological or radiological studies were considered for qualitative analysis.

Results

A total of 30 publications were included. Seventeen papers were used for quantitative analysis while 13 papers were used only for qualitative analysis. A total of 18 cases of POT were identified. Some clinical, radiographic, histopathological and therapeutic features were common in all reported cases, while other aspects of the neoplasm were inconsistent through published cases. This inconsistency was particularly remarkable when dealing with the histopathological features of the neoplasm.

Discussion

Some issues about POT remain unclear and deserve to be clarified by future reports. The description of the odontogenic epithelium covering the ectomesenchyme is often contradictory, while it remains debatable whether peripheral ameloblastic epithelial islands or hard dental tissue deposition can occasionally occur within the tumour.

Le texte complet de cet article est disponible en PDF.

Keywords : Primordial odontogenic tumour, Odontogenic tumours, Jaw neoplasms, Mixed odontogenic tumours, Dental papilla


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