Lymphadenitis is a condition in which your lymph nodes — tissues that help your body fight off illness — become inflamed. Mesenteric lymphadenitis (mez-un-TER-ik lim-fad-uh-NIE-tis) is an inflammation of the lymph nodes in the membrane that attaches your intestine (bowel) to your abdominal wall (mesentery). Mesenteric lymphadenitis usually results from an intestinal infection.
The mesentery connects the bowel to the abdominal cavity. It also limits the movement of the intestines in the abdominal cavity. If not for the mesentery, the bowel likely would more frequently twist upon itself, causing obstruction.
Mesenteric lymphadenitis often mimics the signs and symptoms of appendicitis. Unlike appendicitis, however, mesenteric lymphadenitis is seldom serious and clears on its own.
Signs and symptoms of mesenteric lymphadenitis may include:
Abdominal pain, often centered on the lower, right side, but the pain can sometimes be more widespread
General abdominal tenderness
Depending on what's causing the ailment, other signs and symptoms may include:
Nausea and vomiting
General feeling of being unwell (malaise)
In some cases, swollen lymph nodes are found on imaging tests for another problem. Mesenteric lymphadenitis that doesn't cause symptoms may need further evaluation.
When to see a doctor
Abdominal pain is common in children and teens, and it can be hard to know when it's a problem that needs medical attention.
In general, call your doctor right away if your child has episodes of:
Sudden, severe abdominal pain
Abdominal pain with fever
Abdominal pain with diarrhea or vomiting
In addition, call your doctor if your child has episodes of the following signs and symptoms that don't get better over a short time:
Abdominal pain with a change in bowel habits
Abdominal pain with loss of appetite (anorexia)
Abdominal pain that interferes with sleep
Your lymph nodes play a vital role in your body's ability to fight off illness. They're scattered throughout your body to trap and destroy viruses, bacteria and other harmful organisms. In the process, the nodes closest to the infection can become sore and swollen — for instance, the lymph nodes in your neck may swell when you have a sore throat. Other nodes that commonly swell are located under your chin and in your armpits and groin.
Although less well known, you also have lymph nodes in the mesentery — the thin tissue that attaches your intestine to the back of your abdominal wall. The most common cause of swollen mesenteric nodes is a viral infection, such as gastroenteritis — commonly but incorrectly known as stomach flu.
Some children develop an upper respiratory infection before or during a bout of mesenteric lymphadenitis, and experts speculate that there may be a link between the two.
Mesenteric lymphadenitis usually goes away on its own and rarely causes complications. But if swollen lymph nodes are caused by a serious bacterial infection that isn't treated, the bacteria could spread to your bloodstream, causing a potentially life-threatening infection (sepsis).
If your child has signs and symptoms common to mesenteric lymphadenitis, make an appointment with your family doctor or a pediatrician. Here's some information to help you get ready for your appointment, and what to expect from your doctor.
Information to gather in advance
Write down your child's symptoms, including nonabdominal symptoms. Include details about when you first noticed these symptoms and how they may have changed or worsened over time. If possible, take your child's temperature several times before your appointment and record the results.
Write down your child's key medical information, including any other health conditions and the names of all medications, vitamins and supplements your child is taking. Also bring a record of your child's recent vaccinations. If your child has been seen for similar signs and symptoms in the past, bring those medical records, if possible.
Write down key personal information, including any recent changes or stressors in your child's life.
Write down questions to ask your doctor. Creating a list of questions in advance can help you make the most of the time with your doctor.
For possible mesenteric lymphadenitis, some basic questions to ask include:
What is the most likely cause of my child's condition?
Are there any other possible causes?
What tests does my child need?
Is my child at risk of complications from this condition?
Does my child need treatment? If this is due to an infection, should my child take antibiotics?
What can I do to help make my child more comfortable? What foods should my child avoid?
What signs or symptoms should prompt me to call you while my child is recovering?
Is my child contagious?
When can my child return to school?
What to expect from your doctor
To help in diagnosing your child's condition, your doctor is likely to ask you a number of questions, such as:
When did your child begin experiencing abdominal pain?
Where is the pain located?
Has the pain moved from one part of your child's abdomen to another part?
How severe is the pain? Does your child cry with pain?
What makes the pain more severe?
What helps relieve the pain?
Do your child's symptoms include nausea? Vomiting?
What other signs and symptoms does your child have?
Has your child had similar problems before? Did you seek medical care for him or her? If so, do you have medical records of that visit?
Do any other children in your family or at school or child care have similar but milder symptoms that you know of?
Has your child been diagnosed with any other medical conditions?
To diagnosis your child's condition, your doctor is likely to:
Take your child's medical history. In addition to gathering details about your child's current signs and symptoms, your doctor likely will ask about any other medical conditions for which your child has been treated.
Request laboratory tests. Certain blood tests can help determine whether your child has an infection and what type of infection it is.
Order imaging studies. A computerized tomography (CT) scan of your child's abdomen can help differentiate between appendicitis and mesenteric lymphadenitis. Abdominal ultrasound also may be used.