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Objectives: To determine the frequency of carcinoma of various oral cavity sub sites along with risk factors like smoking.
Material and Methods: Six months Descriptive retrospective study was conducted at Pakistan Institute of Medical Sciences,
Islamabad, Pakistan, in department of ENT, Head & Neck Surgery, from June 2015 to Dec 2015. Five years data
was analyzed from the record room of ENT department, 200 patients with proven malignancy of oral cavity excluding
cases involving oropharynx. The past five years cancer record was analyzed. Tumor staging and nodal staging was
based on size of primary lesion and neck node status on palpation and on CT scan of neck where present in record.
Risk factors were identified accordingly.
Results: The highest frequency was for oral cancer in anterior 2/3rd of tongue, 33.5% followed by floor of mouth, 30.5%,
lower alveolus14%, buccal mucosa 10%, upper alveolus 5%, hard palate 3%, and retromolar trigone,2%each. Tobacco
smoking was identified as the major risk factor for increasing frequency of oral cancer. However, no such association
could be found for age and gender.
Conclusion: Oral cancers are fairly common in our population with tongue and floor of mouth the most frequent sites.
Tobacco smoking is the most common risk factor for oral cancer.
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