The parotid gland is a purely serous secretion gland, it is the most voluminous of the salivary glands, weighs about 25 - 30 grams, has an irregular and lobulated shape, is greyish yellow and looks similar to adipose tissue.
It is located in the parotid lodge, positioned in the retromandibular region and precisely between the posterior border of the mandible branch anteriorly, the anterior border of the sternocleidomastoid muscle posteriorly and the temporomandibular joint cranially.
It has immediate and mediated relationships with large vessels in the neck and with various cranial nerves. Vascularization is provided by the external carotid artery, the transverse facial artery, the posterior auricular artery and the anterior auricular branches of the superficial temporal artery.
These vessels inside the organ are subdivided into numerous branches that run along the interlobar and interlobular excretory ducts. The venous outflow is carried out by the retromandibular vein. The sensory innervation is ensured by the trigeminal nerve through its temporal auricle branch, the excitosecretory innervation comes from parasympathetic fibers originating from the inferior salivatory nucleus (glossopharyngeal) which reach it through the temporal auricle.
The research: Mobile phone use and trends in the incidence of cancers of the parotid and other salivary glands, published on the Cancer epidemiology, analyzes this incidence. Here is what the researchers say: "There has been a significant increase in the use of mobile phones over the last three decades and a possible association with head cancers has been suggested, including cancers of the parotic and other salivary glands.
We examined the incidence time trends of parotid and other salivary gland cancers in Australia to ascertain the influence of increased mobile phone use. Analyzes of incidence time trends were carried out using Poisson regression to estimate the annual percentage change (APC) in the incidence of salivary gland cancers of all available national registration data from 1982 to 2016, as well as specific time periods (1982-1993 , 1994-2005, 2006-2016) representing changes in the prevalence of mobile phone use.
The incidence of parotid gland cancer was stable for the periods 1982-1993 and 1994-2005. During 2006-2016 there was a large decrease in parotid gland cancer for males and a large increase in females for adults aged 20-59 years.
The incidence for other salivary gland cancers was stable during all the periods. The results do not indicate that mobile phone use increased the incidence of parotid or other salivary gland cancers. An increase in parotid gland cancer in females since 2006 may be attributed to other possible risk factors specific to this gender. "