A benign neoplasm that involves the tonsil. The disease is Monarch Disease Ontology id MONDO_0021513 (benign neoplasm of tonsil). Also known as: benign neoplasm of the tonsil, benign tonsil neoplasm, benign tonsil tumor, benign tonsil tumour, benign tonsillar neoplasm, benign tonsillar tumor, benign tonsillar tumour, benign tumor of the tonsil.