Study of benign parotid salivary gland tumors conducted in the University Hospital of Las Palmas during the period 2010-2015

Abstract

Benign tumors of the parotid gland are an infrequent and heterogeneous group due to their histological differences. Their etiology has been unknown until now, although they are more frequent in some racial groups and in people exposed to tobacco and radiation. They are common from the fourth decade of life, characterized by being a mass with slow, asymptomatic growth and they rarely recur. Most of them are diagnosed after physical examination, and an FNAB (fine needle aspiration biopsy). Treatment is surgical. Material and methods: A retrospective and descriptive study of benign tumors was conducted in the population of the south area of the island Gran Canaria and Fuerteventura Island. The study was done on parotid gland tumors detected in 123 patients who visited the Clinic for Maxillofacial Surgery of the University Hospital in Las Palmas during the years 2010 - 2015. The patients were classified according to the histological type of tumor, age, gender, mean hospital stay and clinical characteristics of the tumor. Results: Focused on the pleomorphic adenoma, the results obtained in our study did not show significant differences regarding clinical characteristics in different studies. This tumor was diagnosed in 54% of the cases of total tumors diagnosed, and it was more frequent in women. However, in the comparison, the Warthin tumor showed a high incidence in our population, with 42% of total cases, 9.6% from which developed bilaterally. Conclusions: The tumors have male predominance, with the exception of the pleomorphic adenoma. Our population agrees with that of other authors regarding the incidence of pleomorphic adenoma, however, the number of Warthin tumors is much higher.

Uvod: Dobroćudni tumori parotidne žlezde su retka i heterogena grupa tumora zbog svojih histoloških osobina. Njihova etiologija do sada nije bila poznata, iako su učestaliji kod pripadnika određenih rasa i ljudi izloženih duvanskom dimu i radijaciji. Učestali su od četvrte decenije života, Karakteriše ih masa sporog, asimptomatskog rasta, i retko se recidiviraju. Najveći broj se dijagnostikuje nakon kliničkog pregleda i iglene aspiracione biopsije. Leči se hirurškim putem. Materijal i metode: Retospektivna i opisna studija benignih tumora je bila izvršena na južnom delu populacije ljudi sa Velikog Kanarskog ostrva i Fuertenventura ostrva. Studija je odrađena na tumorima parotidne žlezde koji su detektovani kod 123 pacijenta koji su pregledani na Klinici za maksilofacijalnu hirurgiju u Univeritetskoj bolnici Las Palmasa u periodu od 2010 do 2015. Results: Imajući u vidu pleomorfni adenom, rezultati nisu pokazali značajnu razliku između karakteristika u različitim kliničkim stadijumima. Ovaj tumor je dijagnostikovan kod 54% svih pacijenata sa tumorima, i češći je kod žena. Ali u proeđenju, Warthin tumor je pokazao veću učestalost u našoj populaciji, sa 42% učestolasti, od kojih se 9.6% razvilo bilateralno. Zaključak: Tumori su učestaliji u muškoj populaciji, sa izuzetkom pleomorfnih adenoma. Naši rezultati su u saglasnosti sa studijama drugih autora o učestalosti pleomorfnih adenoma, sa izuzetkom Warthin tumora koji su mnogo češći.