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Published on: October 20, 2013
Macrophage activation syndrome or septic arthritis: a case of mistaken identity
Gemma L Green1, Arash Aframian, Parthiban Vinayakam
1aSt Georges Hospital, Tooting, London bQueen Elizabeth the Queen Mother Hospital, Margate, Kent, UK.
Abstract:
We present an interesting case of macrophage activation syndrome in a 2-year-old, with no previous rheumatological diagnoses, incorrectly diagnosed with septic arthritis, to highlight the diagnostic difficulties, especially in small hospital units. We aim to present the similarities between the two conditions and to summarize the clinical, radiological and epidemiological features of macrophage activation syndrome, an underdiagnosed condition. A review of the current literature was performed, and a diagnostic algorithm was created. No current set treatment regimen exists, but current recommendations have been included. We have demonstrated the pitfalls in diagnosis and the importance of immediate treatment in optimizing prognosis.
Insights
Macrophage activation syndrome (MAS) can mimic septic arthritis, posing diagnostic challenges, especially in pediatric cases. Early recognition and prompt treatment are crucial for improving outcomes in this underdiagnosed condition.
Area of Science:
- Pediatric Rheumatology
- Pediatric Infectious Diseases
- Critical Care Medicine
Background:
- Macrophage activation syndrome (MAS) is a severe, life-threatening hyperinflammation.
- It is often underdiagnosed and can be mistaken for other critical conditions like septic arthritis.
- Prompt diagnosis and management are vital for patient survival.
Observation:
- A case of MAS in a 2-year-old, initially misdiagnosed as septic arthritis, highlights diagnostic difficulties.
- Similarities in clinical presentation between MAS and septic arthritis can lead to misdiagnosis.
- Small hospital units face particular challenges in differentiating these conditions.
Findings:
- A literature review was conducted to identify clinical, radiological, and epidemiological features of MAS.
- A diagnostic algorithm was developed to aid in differentiating MAS from septic arthritis.
- Current treatment recommendations, despite the lack of a set regimen, were compiled.
Implications:
- This case underscores the diagnostic pitfalls in distinguishing MAS from septic arthritis.
- Implementing a structured diagnostic approach can improve early identification of MAS.
- Timely intervention in MAS is critical for optimizing patient prognosis and reducing mortality.
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