Michael E. Lazarus

Mesenteric Adenitis I. What every physician needs to know. Right lower quadrant (RLQ) pain is a common initial presenting complaint with acute appendicitis as the most frequent cause. Mesenteric adenitis, also known as mesenteric lymphadenitis, is caused by inflamed mesenteric lymph nodes and is the second most common cause of acute RLQ abdominal pain. Mesenteric…