List four causes of eggshell calcification of the hilar and mediastinal lymph nodes. List three common causes of hilar lymphadenopathy. What can cause markedly enhancing hilar lymphadenopathy on CT? What distinguishes hilar adenopathy from pulmonary artery enlargement? Book traversal links for Adenopathy ‹ Hilar disorders Up List four causes of eggshell calcification of the hilar and mediastinal lymph nodes. ›