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C11

Malignant neoplasm of nasopharynx

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 Rosenmüller
• 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