benign neoplasm of epididymis (Monarch Disease Ontology term MONDO_0021473) is a benign neoplasm that involves the epididymis. Also known as: benign epididymal neoplasm, benign epididymal tumor, benign epididymal tumour, benign neoplasm of the epididymis, benign tumor of epididymis, benign tumor of the epididymis, benign tumour of epididymis, benign tumour of the epididymis.