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 dependence (F17.-)
 * tobacco use (Z72.0)
 * C11.0 Malignant neoplasm of superior wall of nasopharynx
 * Malignant neoplasm of roof of nasopharynx
 * C11.1 Malignant neoplasm of posterior wall of nasopharynx
 * Malignant neoplasm of adenoid
 * Malignant neoplasm of pharyngeal tonsil
 * C11.2 Malignant neoplasm of lateral wall of nasopharynx
 * Malignant neoplasm of fossa of Rosenm?ller
 * Malignant neoplasm of opening of auditory tube
 * Malignant neoplasm of pharyngeal recess
 * C11.3 Malignant neoplasm of anterior wall of nasopharynx
 * Malignant neoplasm of floor of nasopharynx
 * Malignant neoplasm of nasopharyngeal (anterior) (posterior) surface of soft palate
 * Malignant neoplasm of posterior margin of nasal choana
 * Malignant neoplasm of posterior margin of nasal septum
 * C11.8 Malignant neoplasm of overlapping sites of nasopharynx
 * C11.9 Malignant neoplasm of nasopharynx, unspecified
 * Malignant neoplasm of nasopharyngeal wall NOS

C12 Malignant neoplasm of pyriform sinus

 * Includes: malignant neoplasm of pyriform fossa
 * Use additional code to identify:
 * exposure to environmental tobacco smoke (Z77.22)
 * exposure to tobacco smoke in the perinatal period (P96.81)
 * history of tobacco use (Z87.891)
 * occupational exposure to environmental tobacco smoke (Z57.31)
 * tobacco dependence (F17.-)
 * tobacco use (Z72.0)

C13 Malignant neoplasm of hypopharynx

 * Excludes2: malignant neoplasm of pyriform sinus (C12)
 * Use additional code to identify:
 * exposure to environmental tobacco smoke (Z77.22)
 * exposure to tobacco smoke in the perinatal period (P96.81)
 * history of tobacco use (Z87.891)
 * occupational exposure to environmental tobacco smoke (Z57.31)
 * tobacco dependence (F17.-)
 * tobacco use (Z72.0)
 * C13.0 Malignant neoplasm of postcricoid region
 * C13.1 Malignant neoplasm of aryepiglottic fold, hypopharyngeal aspect
 * Malignant neoplasm of aryepiglottic fold NOS
 * Malignant neoplasm of interarytenoid fold NOS
 * Malignant neoplasm of aryepiglottic fold marginal zone
 * Malignant neoplasm of interarytenoid fold marginal zone
 * Excludes2: