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[Peripheral lymphadenopathy in childhood--recommendations for diagnostic evaluation]
M Benesch1, R Kerbl, A Wirnsberger
1Universitätsklinik für Kinder- und Jugendheilkunde, Karl-Franzens-Universität Graz. martin.benesch@klinikum-graz.at
Insights
Childhood peripheral lymphadenopathy is often caused by infections like Epstein-Barr virus (EBV) and bacterial lymphadenitis. Clinical assessment guides diagnosis, with targeted lab tests confirming common causes of swollen lymph nodes.
Area of Science:
- Pediatrics
- Infectious Diseases
- Immunology
Context:
- Childhood peripheral lymphadenopathy is a common clinical presentation.
- Enlargement of lymph nodes is frequently associated with local inflammatory processes in children.
Purpose:
- To analyze the most common causes of peripheral lymphadenopathy in children.
- To develop a diagnostic algorithm for evaluating childhood peripheral lymph node enlargement.
Summary:
- Epstein-Barr virus (EBV) infection was diagnosed in 23% of cases, acute bacterial lymphadenitis in 21.8%, and post/parainfectious viral causes in 24.1%.
- Clinical evaluation, including lymph node characteristics and patient symptoms, is crucial.
- Laboratory tests such as complete blood count and antibody testing aid in identifying specific infectious agents.
Impact:
- Provides a clinical framework for diagnosing childhood lymphadenopathy.
- Highlights the importance of clinical presentation in guiding diagnostic workup.
- Suggests that a combination of clinical assessment and limited laboratory tests can effectively determine the cause of lymphadenopathy.
Background:
Enlargement of peripheral lymph nodes most commonly caused by a local inflammatory process is frequently seen in childhood. The aim of the present study was to analyze the most common causes of peripheral lymphadenopathy and to develop a simple algorithm for the primary diagnostic evaluation of peripheral lymph node enlargement in this age group.
Patients:
Between April and September 1999 87 unselected children (median age: 5 1/2 years) with peripheral lymphadenopathy were referred to the Department of Pediatrics, University of Graz, for further investigation.
Results:
EBV infection was diagnosed in 20 (23.0%) children. 19 (21.8%) patients had acute bacterial lymphadenitis. In 21 (24.1%) patients lymph node enlargement was classified as "post/parainfectious (viral)". Four patients each had toxoplasmosis and cat scratch disease. In 11 (12.6%) patients neither physical nor laboratory examinations revealed pathologic results. Among the remaining 8 children sarcoidosis and Hodgkin disease was diagnosed in one patient each. Small, soft, mobile, nontender, cervical, axillary or inguinal lymph nodes do not require further investigations. In case of enlarged, tender lymph nodes with overlying skin erythema and fever diagnostic evaluation should include complete blood count, erythrocyte sedimentation rate and/or c-reactive protein level, supplemented by appropriate antibody testing (EBV, CMV, Toxoplasma gondii, Bartonella henselae). Firm, enlarged, painless lymph nodes which are matted together and fixed to the skin or underlying tissues necessitate a more detailed diagnostic evaluation in order to exclude malignant or granulomatous diseases.
Conclusions:
Our study demonstrated that primary diagnostic evaluation of childhood peripheral lymphadenopathy is mainly based on clinical grounds. In most cases a small number of additionally performed laboratory tests allow to correctly identify the cause of the peripheral lymph node enlargement.