Some conditions are more common among children than they are among adults, and mesenteric adenitis is one of those conditions. Children and teens are most susceptible to this condition that is often caused by a virus or bacteria in the stomach. Read on to learn more about it from our AFC Urgent Care Farragut team. What Is Mesenteric Adenitis? Mesenteric adenitis, sometimes known as mesenteric lymphadenitis, is the swelling of the lymph nodes in the ...