Adenitis is a general term for an inflammation of a gland or lymph node. Classification Cervical adenitis is an inflammation of a lymph node in the neck. Lymph adenitis is caused by bacterial infection in lymph nodes. The infected lymph nodes become enlarged, warm and tender. A swelling of lymph nodes due to growth of lymph cells is called lymphadenopathy. Mesenteric adenitis is an inflammation of the mesenteric lymph nodes in the abdomen. If it occurs in the right lower quadrant, it can be mist… (More on Adenitis)