Definition

Mesenteric adenitis is when lymph nodes in the abdomen swell. Lymph nodes are small, round glands. They help fight infection. Infections sometimes make the nodes swell. When nodes in the abdomen swell, it can cause pain.

Normal Anatomy of the Intestines

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Causes

Mesenteric adenitis is often caused by an infection in the stomach or intestines. Viruses are the most common cause of these infections. However, some may be due to bacteria.

Risk Factors

The risk of mesenteric adenitis is highest in children.

Symptoms

Symptoms often follow a cold. They may include:

• Pain in the belly, often the lower, right side
• Fever
• Nausea
• Diarrhea

Diagnosis

The doctor will ask about your child’s symptoms and health history. A physical exam will be done.

The child may be given blood and urine tests.

Images may be taken of the child’s body structures. This can be done with:

• CT scan
• Ultrasound

Treatment

Mesenteric adenitis is usually not serious. Symptoms go away in a few days to weeks. Treatment options may be:

• Over-the-counter pain medicine—to ease discomfort
• Antibiotics—rarely, if there is a lasting bacterial infection

Prevention

The risk of mesenteric adenitis may be reduced by:

• Washing hands often
• Avoiding close contact with people who are sick