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. 2015 Sep 1;20(5):e532-9.
doi: 10.4317/medoral.20337.

Incidence and prevalence of salivary gland tumours in Valparaiso, Chile

Juan Araya  1 , René Martinez, Sven Niklander, Maureen Marshall, Alfredo Esguep
Affiliations

Incidence and prevalence of salivary gland tumours in Valparaiso, Chile

Juan Araya et al. Med Oral Patol Oral Cir Bucal. .

Abstract

Background: To determine the incidence and prevalence of salivary gland tumours in the province of Valparaíso, Chile.

Material and methods: Retrospective review of salivary gland tumours diagnosed between the years 2000 and 2011 from four local pathology services. Information on demographics and histopathology were retrieved from the medical records.

Results: The study sample consisted of 279 salivary gland tumours. Prevalence and incidence rates per 100.000 persons were 15.4 and 2.51, respectively. Most of the neoplasms corresponded to benign tumours (70.3%). The most affected gland was the parotid gland. Pleomorphic adenoma was the most common benign tumour (53.8%) and mucoepidermoid carcinoma was the most common malignant tumour (7.2%).

Conclusions: Salivary gland tumours are uncommon neoplasms that usually arise in the parotid gland. Pleomorphic adenoma and mucoepidermoid carcinoma were the most common benign and malignant tumours reported in this series.

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Conflict of interest statement

Conflict of interest statement: The authors have declared that no conflict of interest exist.

Figures

Figure 1
Figure 1
Pleomorphic adenoma: A.Well defined, round to ovoid tumour located in the left side of the hard palate. B. Proliferation of epithelial and myoepithelial cells, some with plasmacytoid appearance, forming duct-like structures containig eosinophilic secretory material with a mesenchimal myxoid component (HE, 10x).
Figure 2
Figure 2
Mucoepidermoid carcinoma: A. Ill-defined, ulcerated, erythematous mass located on the left hard palate. B: Sheets of squamous and mucous producing cells forming cystic spaces. (HE 10x) C: Cystic space linned by numerous, large, mucous producing cells. (HE; 40x).
Figure 3
Figure 3
Adenoid cystic carcinoma: A. Ill-defined mass on the right side of the hard palate with an erythematous surface. B: Adenoid cystic carcinoma, cribiform pattern: proliferation of ductal and miopepithelial cells with hyperchromatic nuclei, arranged in nests forming microcystic spaces filled with basophilic mucoid material, separated by hyalinized fibrous conective tissue. (HE, 10x) 3. C: Perineural invasion, a common feature of adenoid cysic carcinoma (HE, 40x).
See this image and copyright information in PMC

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