Monarch Disease Ontology id MONDO_0021501 (benign neoplasm of small intestine) is a benign neoplasm that involves the small intestine. Also known as: benign neoplasm of the small intestine, benign small intestinal neoplasm, benign small intestinal tumor, benign small intestinal tumour, benign small intestine neoplasm, benign small intestine tumor, benign small intestine tumour, benign tumor of small intestine.