A neoplasm (disease) that involves the hypopharynx. The disease is neoplasm of hypopharynx (Monarch Disease Ontology identifier MONDO_0021358). Also known as: hypopharyngeal neoplasm, hypopharyngeal neoplasms, hypopharyngeal tumor, hypopharyngeal tumour, hypopharynx neoplasm, hypopharynx neoplasm (disease), hypopharynx tumor, hypopharynx tumour.