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Intraoral Sialadenoma Papilliferum: A Comprehensive Review of the Literature with Emphasis on Clinical and Histopathological Diagnostic Features

Oral(2022)

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Abstract
Background. Sialadenoma papilliferum (SP) is a rare benign epithelial tumor of salivary gland origin, its diagnosis being potentially challenging. It was first described by Abrams and Finck in 1969 as an analog of the cutaneous syringocystadenoma papilliferum. The aim of this comprehensive review is to highlight the clinical and histopathological diagnostic aspects of intraoral SP, analyzing cases previously described and reporting new cases. Methods. Medline, Scopus, and Web of Science were searched up to February 2022, using as entry term “sialadenoma papilliferum”. No time limits were applied and only studies in English were taken into account. Only cases involving the mouth were included. Conference proceedings, personal communications, and letters to the editor were excluded. Results. In total, 42 out of 234 articles fulfilled the inclusion criteria, with 64 cases reported. Mean age of patients with SP was 57.2 years, with a higher prevalence among males. The most affected site was the palate, particularly the hard palate. Four cases with uncertain malignant features have been reported. While clinical manifestations of SP are rather unspecific (e.g., submucosal swelling with ulceration), histopathological and immunohistochemical features are quite peculiar, SP have a limited growth potential, leading to conservative excision as treatment of choice. Conclusions. SP, though rare, should be taken into consideration in the differential diagnosis of intraoral swellings, particularly those located on the palate.
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Key words
sialadenoma papilliferum,salivary gland tumors,oral pathology,oral medicine,oral surgery
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