Malignant neoplasm of pharynx, unspecified | Malignant neoplasm of Waldeyer's ring | Pharyngeal cancer | Pharyngeal cancer stage unspecified | Pharynx neoplasm malignant | Pharyngeal Neoplasms | Neoplasm, Pharyngeal | Pharyngeal Neoplasm | Neoplasms, Pharynx | Neoplasms, Pharyngeal | Pharynx Neoplasms | Neoplasm, Pharynx | Pharynx Neoplasm | Cancer of Pharynx | Pharynx Cancer | Pharynx Cancers | Cancer of the Pharynx | Pharnyx Cancer | Cancer, Pharnyx | Cancers, Pharnyx | Pharnyx Cancers | Pharyngeal Cancer | Cancer, Pharyngeal | Cancers, Pharyngeal | Pharyngeal Cancers |