Although it’s not the most well-known condition, mesenteric adenitis is relatively common among children and young teens. It’s often mistaken for appendicitis, but it’s much less severe. Read on to learn more about it and its common causes from our AFC Urgent Care Sevierville team. What Is Mesenteric Adenitis? Mesenteric adenitis (also known as mesenteric lymphadenitis) is the swelling of the lymph nodes in the mesentery, which attaches the intestines to the ...