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 malignant neoplasm of aryepiglottic fold or interarytenoid fold, laryngeal aspect (C32.1)
 * C13.2 Malignant neoplasm of posterior wall of hypopharynx
 * C13.8 Malignant neoplasm of overlapping sites of hypopharynx
 * C13.9 Malignant neoplasm of hypopharynx, unspecified
 * Malignant neoplasm of hypopharyngeal wall NOS

C14 Malignant neoplasm of other and ill-defined sites in the lip, oral cavity and pharynx

 * Excludes1: malignant neoplasm of oral cavity NOS (C06.9)
 * Use additional code to identify:
 * alcohol abuse and dependence (F10.-)
 * 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)
 * C14.0 Malignant neoplasm of pharynx, unspecified
 * C14.2 Malignant neoplasm of Waldeyer's ring
 * C14.8 Malignant neoplasm of overlapping sites of lip, oral cavity and pharynx
 * Primary malignant neoplasm of two or more contiguous sites of lip, oral cavity and pharynx
 * Excludes1: "book leaf" neoplasm [ventral surface of tongue and floor of mouth] (C06.89)

Malignant neoplasm of digestive organs (C15-C26)

 * Excludes1: Kaposi's sarcoma of gastrointestinal sites (C46.4)

C15 Malignant neoplasm of esophagus

 * Use additional code to identify:
 * alcohol abuse and dependence (F10.-)
 * C15.3 Malignant neoplasm of upper third of esophagus
 * C15.4 Malignant neoplasm of middle third of esophagus
 * C15.5 Malignant neoplasm of lower third of esophagus
 * Excludes1: malignant neoplasm of cardio-esophageal junction (C16.0)
 * C15.8 Malignant neoplasm of overlapping sites of esophagus
 * C15.9 Malignant neoplasm of esophagus, unspecified

C16 Malignant neoplasm of stomach

 * Use additional code to identify:
 * alcohol abuse and dependence (F10.-)
 * Excludes2: malignant carcinoid tumor of the stomach (C7a.092)
 * C16.0 Malignant neoplasm of cardia
 * Malignant neoplasm of cardiac orifice
 * Malignant