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Lymphatic system
Lymphatic system


Staphylococcal lymphangitis
Staphylococcal lymphangitis


Immune system structures
Immune system structures


Definition:

Lymphadenitis is an infection of the lymph nodes (also called lymph glands). It is a common complication of certain bacterial infections.



Alternative Names:

Lymph node infection; Lymph gland infection; Localized lymphadenopathy



Causes, incidence, and risk factors:

The lymph system is a network of organs, lymph nodes, lymph ducts, and lymph vessels (or channels) that produce and move a fluid called lymph from tissues to the bloodstream. For more information on this part of the body, see lymph system .

The lymph glands, or nodes, are small structures that filter the lymph fluid. There are many white blood cells in the lymph nodes to help fight infection.

Lymphadenitis occurs when the glands become enlarged by inflammation, usually in response to bacteria, viruses, or fungi. The swollen glands are usually found near the site of an underlying infection, tumor, or inflammation.

Lymphadenitis may occur after skin infections or other bacterial infections, particularly those due to streptococcus or staphylococcus. Sometimes it is caused by rare infections such as tuberculosis or cat scratch disease (Bartonella).



Symptoms:
  • Swollen, tender, or hard lymph nodes
  • Red, tender skin over lymph node

Lymph nodes may feel rubbery if an abscess has formed.



Signs and tests:

The health care provider will perform a physical exam, which includes feeling your lymph nodes and looking for signs of injury or infection around any swollen lymph nodes.

A biopsy and culture of the affected area or node may reveal the cause of the inflammation. Blood cultures may reveal spread of infection to the bloodstream.



Treatment:

Lymphadenitis may spread within hours. Treatment should begin promptly.

Treatment may include:

  • Antibiotics to treat any underlying infection
  • Analgesics (pain killers) to control pain
  • Anti-inflammatory medications to reduce inflammation and swelling
  • Cool compresses to reduce inflammation and pain

Surgery may be needed to drain any abscess.



Support Groups:



Expectations (prognosis):

Prompt treatment with antibiotics usually results in complete recovery, though it may take weeks, or even months, for swelling to disappear. The amount of time until recovery occurs will vary depending on the underlying cause.



Complications:
  • Abscess formation
  • Cellulitis (a skin infection)
  • Sepsis (generalized or bloodstream infection)
  • Fistulas (seen in lymphadenitis that is due to tuberculosis)


Calling your health care provider:

Call your health care provider or go to the emergency room if you have symptoms of lymphadenitis.



Prevention:

Good general health and hygiene are helpful in the prevention of any infection.



References: Armitage JO. Approach to the patient with lymphadenopathy and splenomegaly. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier. 2007: chap 174.


Review Date: 5/30/2009
Reviewed By: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine; Jatin M. Vyas, MD, PhD, Assistant Professor in Medicine, Harvard Medical School, Assistant in Medicine, Division of Infectious Disease, Department of Medicine, Massachusetts General Hospital. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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