Malignant neoplasms of the oral cavity and pharynx
Exposure to second hand tobacco smoke (acute) (chronic)
Passive smoking (acute) (chronic)
Malignant neoplasm of vallecula
Malignant neoplasm of anterior surface of epiglottis
Malignant neoplasm of lateral wall of oropharynx
Malignant neoplasm of posterior wall of oropharynx
Malignant neoplasm of branchial cleft
Malignant neoplasm of overlapping sites of oropharynx
Malignant neoplasm of oropharynx, unspecified