Necrosis can be benign or it can indicate lymphoma, which is cancer of the lymph nodes, according to the Free Dictionary. Benign necrosis can result from viral or bacterial infections, such as cat-scratch disease; Epstein-Barr virus; fungal infection; chlamydia; a parasitic disease, such as toxoplasmosis; tuberculosis; trauma; blocked blood vessels; and Kawasaki’s or Castleman’s disease.
https://www.reference.com/world-view/necrotic-lymph-node-e4c61aea9df38aa8

