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C13

Malignant neoplasm of hypopharynx

• malignant neoplasm of pyriform sinus (C12)

C13.0

Malignant neoplasm of postcricoid region

C13.1

Malignant neoplasm of aryepiglottic fold, hypopharyngeal aspect

• malignant neoplasm of aryepiglottic fold or interarytenoid fold, laryngeal aspect (C32.1)

• Malignant neoplasm of aryepiglottic fold, marginal zone
• Malignant neoplasm of aryepiglottic fold NOS
• Malignant neoplasm of interarytenoid fold, marginal zone
• Malignant neoplasm of interarytenoid fold NOS

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