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==Overview==
==Overview==
Common risk factors in the development of salivary gland tumors are age, [[radiation]] exposure, environment and occupational exposure, certain viruses, male gender, [[smoking]] and [[family history]].<ref name="CCS">  Salivary gland cancer. Canadian cancer society(2015)http://www.cancer.ca/en/cancer-information/cancer-type/salivary-gland/risks/?region=sk Accessed on November 8, 2015</ref>
Common risk factors in the development of salivary gland tumors are age, [[radiation]] exposure, environment and occupational exposure, certain viruses, male gender, [[smoking]], and [[family history]].<ref name="CCS">  Salivary gland cancer. Canadian cancer society(2015)http://www.cancer.ca/en/cancer-information/cancer-type/salivary-gland/risks/?region=sk Accessed on November 8, 2015</ref>
 
==Risk Factors==
==Risk Factors==
Common risk factors in the development of [[salivary gland]] [[tumors]] include the following:<ref name="CCS">  Salivary gland cancer. Canadian cancer society(2015)http://www.cancer.ca/en/cancer-information/cancer-type/salivary-gland/risks/?region=sk Accessed on November 8, 2015</ref>
Common risk factors in the development of [[salivary gland]] [[tumors]] includes the following:<ref name="CCS">  Salivary gland cancer. Canadian cancer society(2015)http://www.cancer.ca/en/cancer-information/cancer-type/salivary-gland/risks/?region=sk Accessed on November 8, 2015</ref>
*Age.
*Age
**Salivary gland tumors can occur at any age, although it is most commonly diagnosed in older adults. 2 out of every 3 salivary gland cancers are found in people 55 and older. The average age at which salivary gland cancers are found is at the age of 64.
**Salivary gland tumors can occur at any age, although it is most commonly diagnosed in older adults. Two out of every 3 salivary gland cancers are found in people 55 and older. The average age at which salivary gland cancers are found is at the age of 64.
*Radiation exposure.
*Radiation exposure
**[[Radiation therapy]] to the [[head]] or [[neck]] for any medical reason may increase the risk of developing salivary gland cancer. There is convincing evidence that exposure to radiation increases your risk for salivary gland cancer. The risk is related to how much radiation someone is exposed to. People who had [[radiation therapy]] to the head or neck and atomic bomb survivors have the highest risk. People who had many full-mouth dental [[x-rays]] also have a high risk for salivary gland cancer. This is especially true for people who had these x-rays before the 1960s when the doses of radiation were much higher. There is also an increased risk for salivary gland cancer in people who were treated with radioactive iodine-131 for [[thyroid cancer]].
**[[Radiation therapy]] to the [[head]] or [[neck]] for any medical reason may increase the risk of developing salivary gland cancer. There is convincing evidence that exposure to radiation increases your risk for salivary gland cancer. The risk is related to how much radiation someone is exposed to. People who had [[radiation therapy]] to the head or neck and atomic bomb survivors have the highest risk. People who had many full-mouth dental [[x-rays]] also have a high risk for salivary gland cancer. This is especially true for people who had these x-rays before the 1960s when the doses of radiation were much higher. There is also an increased risk for salivary gland cancer in people who were treated with radioactive iodine-131 for [[thyroid cancer]].
*Environmental/occupational exposure.
*Environmental or occupational exposure
**Environment or occupational exposure to sawdust and chemicals used in the leather industry, pesticides, and some industrial solvents may increase the risk of a type of salivary gland cancer that occurs in the [[nose]] and [[sinuses]].   
**Environment or occupational exposure to sawdust, chemicals used in the leather industry, pesticides, and some industrial solvents may increase the risk of a type of salivary gland cancer that occurs in the [[nose]] and [[sinuses]].   
*Certain viruses
*[[HIV]] and [[EBV]]
**Viruses that are associated with salivary gland cancer include [[HIV]] and the [[Epstein-Barr virus]].  
**Viruses that are associated with salivary gland cancer include [[HIV]] and the [[Epstein-Barr virus]].  
*Male gender
*Male gender
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**Rarely, members of some families seem to have a higher than usual risk of developing salivary gland cancers. The majority of people who get salivary gland cancer do not have a family history of this disease.
**Rarely, members of some families seem to have a higher than usual risk of developing salivary gland cancers. The majority of people who get salivary gland cancer do not have a family history of this disease.
*[[Smoking]]
*[[Smoking]]
**Warthin [[tumor]] has a strong association with smoking, although in other salivary gland tumors no clear relationship is seen.<ref>Barnes, Leon. Pathology and genetics of head and neck tumours. Lyon: IARC Press, 2005. Print.</ref>  
**[[Warthin's tumor]] has a strong association with smoking, although in other salivary gland tumors no clear relationship is seen.<ref>Barnes, Leon. Pathology and genetics of head and neck tumours. Lyon: IARC Press, 2005. Print.</ref>  
*Other possible risk factors
The following factors have been linked with salivary gland cancer, but there is not enough evidence to show they are known risk factors. Further study is needed to clarify the role of these factors for salivary gland cancer.
*[[Epstein-Barr virus]] (EBV)
**Some studies have shown a link between [[EBV]] infection and a type of salivary gland cancer called lymphoepithelial carcinoma. This type of cancer is mostly seen in Inuit and people living in southern China.
*[[Human papillomavirus]]
**There are no conclusive data that support a causative role for [[HPV]] in the etiology of salivary gland cancers.<ref name="HafedFarag2012">{{cite journal|last1=Hafed|first1=Layla|last2=Farag|first2=Heba|last3=Shaker|first3=Olfat|last4=El-Rouby|first4=Dalia|title=Is human papilloma virus associated with salivary gland neoplasms? An in situ-hybridization study|journal=Archives of Oral Biology|volume=57|issue=9|year=2012|pages=1194–1199|issn=00039969|doi=10.1016/j.archoralbio.2012.03.009}}</ref><ref name="BolandMcPhail2011">{{cite journal|last1=Boland|first1=Jennifer M|last2=McPhail|first2=Ellen D|last3=García|first3=Joaquín J|last4=Lewis|first4=Jean E|last5=Schembri-Wismayer|first5=David J|title=Detection of human papilloma virus and p16 expression in high-grade adenoid cystic carcinoma of the head and neck|journal=Modern Pathology|volume=25|issue=4|year=2011|pages=529–536|issn=0893-3952|doi=10.1038/modpathol.2011.186}}</ref><ref name="JourWest2013">{{cite journal|last1=Jour|first1=G.|last2=West|first2=K.|last3=Ghali|first3=V.|last4=Shank|first4=D.|last5=Ephrem|first5=G.|last6=Wenig|first6=B. M.|title=Differential Expression of p16INK4A and Cyclin D1 in Benign and Malignant Salivary Gland Tumors: A Study of 44 Cases|journal=Head and Neck Pathology|volume=7|issue=3|year=2013|pages=224–231|issn=1936-055X|doi=10.1007/s12105-012-0417-9}}</ref>
*Workplace exposure to certain substances.
**People who are involved in rubber manufacturing, [[asbestos]] mining and plumbing have an increased risk of [[salivary gland]] cancer.
*[[Tobacco]] and alcohol
**While tobacco is a strong risk factor for other types of head and neck cancer, the evidence isn’t as strong for salivary gland cancer. Some studies show that people who use tobacco products have a higher risk, while others don’t show the same results. The risk of developing salivary gland cancer from using smokeless tobacco, such as chewing [[tobacco]] or snuff, is not very clear. Although tobacco and alcohol can increase the risk for several cancers of the head and neck area, they have not been strongly linked to salivary gland cancers in most studies.
*Diet
**Some studies have found that a diet high in animal fat and low in vegetables may increase the risk of salivary gland cancer, but more research is needed to confirm this possible link.
*Cell phone use
**One study has suggested an increased risk of parotid gland tumors among heavy cell phone users. In this study, most of the tumors seen were benign. Other studies looking at this issue have not found such a link. Research in this area is still in progress.


==References==
==References==
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[[Category:Disease]]
[[Category:Disease]]
[[Category:Rare cancers]]
[[Category:Rare cancers]]
[[Category:Up-To-Date]]
[[Category:Oncology]]
[[Category:Medicine]]
[[Category:Gastroenterology]]
[[Category:Surgery]]
[[Category:Otolaryngology]]

Latest revision as of 15:28, 27 November 2017

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Associate Editor(s)-in-Chief: Simrat Sarai, M.D. [2]

Overview

Common risk factors in the development of salivary gland tumors are age, radiation exposure, environment and occupational exposure, certain viruses, male gender, smoking, and family history.[1]

Risk Factors

Common risk factors in the development of salivary gland tumors includes the following:[1]

  • Age
    • Salivary gland tumors can occur at any age, although it is most commonly diagnosed in older adults. Two out of every 3 salivary gland cancers are found in people 55 and older. The average age at which salivary gland cancers are found is at the age of 64.
  • Radiation exposure
    • Radiation therapy to the head or neck for any medical reason may increase the risk of developing salivary gland cancer. There is convincing evidence that exposure to radiation increases your risk for salivary gland cancer. The risk is related to how much radiation someone is exposed to. People who had radiation therapy to the head or neck and atomic bomb survivors have the highest risk. People who had many full-mouth dental x-rays also have a high risk for salivary gland cancer. This is especially true for people who had these x-rays before the 1960s when the doses of radiation were much higher. There is also an increased risk for salivary gland cancer in people who were treated with radioactive iodine-131 for thyroid cancer.
  • Environmental or occupational exposure
    • Environment or occupational exposure to sawdust, chemicals used in the leather industry, pesticides, and some industrial solvents may increase the risk of a type of salivary gland cancer that occurs in the nose and sinuses.
  • HIV and EBV
  • Male gender
    • Salivary gland tumors are more common in men than in women.
  • Family history
    • Rarely, members of some families seem to have a higher than usual risk of developing salivary gland cancers. The majority of people who get salivary gland cancer do not have a family history of this disease.
  • Smoking
    • Warthin's tumor has a strong association with smoking, although in other salivary gland tumors no clear relationship is seen.[2]

References

  1. 1.0 1.1 Salivary gland cancer. Canadian cancer society(2015)http://www.cancer.ca/en/cancer-information/cancer-type/salivary-gland/risks/?region=sk Accessed on November 8, 2015
  2. Barnes, Leon. Pathology and genetics of head and neck tumours. Lyon: IARC Press, 2005. Print.

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