Mesenteric lymphadenitis

Mesenteric lymphadenitis is generally thought to be caused by a bloodstream infection of streptococcus, and it is also believed to be related to intestinal inflammation and parasitic disease. More common in the terminal ileum. The lymph nodes showed multiple hyperemia and swelling. There may be a small amount of inflammatory exudate in the abdominal cavity. Lymphatic sinus expansion is seen under the microscope, and neutrophils enter the lymphatic sinus from small blood vessels, engulfing bacteria. Some white blood cells can degenerate and collapse, resulting in cell debris or degenerate substances. The blood vessels in the lymph nodes are also dilated and congested, germinal centers proliferate, and sinus cells and immunoblasts proliferate. The disease is more common in children under 7 years of age.

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