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| ==Causes== | | ==Causes== |
| Causes of hypopharyngeal cancer include:<ref name=causewiki>Causes of hypopharyngeal cancer. Wikipedia. https://en.wikipedia.org/wiki/Hypopharyngeal_cancer#cite_note-National_Cancer_Institute._General_Information_About_Hypopharyngeal_Cancer-1</ref>
| | There are no established direct causes for hypopharngeal cancer. Common risk factors for hypopharyngeal cancer can be found [[Hypopharyngeal cancer risk factors|'''here''']]. |
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| ! style="background: #4479BA; width: 200px;" | {{fontcolor|#FFF|Causes}}
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| ! style="background: #4479BA; width: 400px;" | {{fontcolor|#FFF|Description}}
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| Smoking
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| *Mutations may change a normal DNA sequence to an oncogene, which is a gene that causes cancer after exposure to a [[carcinogen]].
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| *Squamous cells, a type of cell that lines hollow organs like the throat, mouth, lungs, and outer layer of skin, are particularly vulnerable when exposed to cigarette smoke.
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| Chewing tobacco
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| *The chewing tobacco is placed into the mouth, leaving it exposed to enzymes, like [[amylase]], which partly digests the carcinogenic material. Saliva is swallowed, along with the cancer-promoting material, which passes through the hypopharynx on its way to the [[esophagus]].
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| Heavy alcohol consumption
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| *Heavy alcohol consumption is linked to hypopharyngeal cancer as well. Alcohol damages the lining of the hypopharynx, increasing the amount of chemicals that are allowed to seep into the underlying membranes. Heavy alcohol use is also associated with nutritional deficiencies.
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| [[Plummer-Vinson syndrome]]
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| *A genetic disorder that causes a long-term iron deficiency, may also lead to hypopharyngeal cancer.
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| *Other factors like a deficiency in certain vitamins also appear to contribute to this type of cancer.
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| ==References== | | ==References== |