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Updated: Aug 27, 2025

Knee Arthrocentesis in Adults
Published on: February 25, 2022
Fever and Knee Effusion in the Pediatric Patient
Kaileen Jafari1, George A Woodward2
1From the Senior Fellow (PEM faculty as of February 2022), Division of Emergency Medicine, University of Washington Department of Pediatrics, Seattle Children's Hospital.
Fever and knee effusion in children require careful evaluation. This review outlines diagnostic strategies and management for pediatric knee effusions, considering infectious, rheumatologic, and other serious causes.
Area of Science:
- Pediatric Rheumatology
- Pediatric Infectious Diseases
- Pediatric Orthopedics
Background:
- Pediatric knee effusion with fever is a clinical concern.
- Trauma is a common cause, but fever necessitates exploring other etiologies.
- Infectious, rheumatologic, vasculitic, and malignant causes must be considered.
Purpose of the Study:
- To review key components of history and physical examination for pediatric fever and knee effusion.
- To outline diagnostic strategies for evaluating pediatric knee effusions.
- To discuss common etiologies and initial management of febrile pediatric knee effusions.
Main Methods:
- Literature review of pediatric knee effusions with fever.
- Synthesis of information on clinical presentation, diagnostic workup, and management.
- Focus on differentiating between common and serious causes.
Main Results:
- A thorough history and physical examination are crucial.
- Diagnostic evaluation should systematically rule out serious conditions.
- Prompt identification of etiology guides appropriate treatment.
Conclusions:
- Fever in pediatric knee effusion warrants comprehensive investigation beyond trauma.
- Early and accurate diagnosis is essential for effective management.
- This review provides a framework for clinicians managing these complex cases.
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Clinical Manifestations:
Patterns of Fever
Methods of reducing fever
Pharmacological Methods of Reducing Fever:
Types of Fever
Here are the different types of fever: