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Macrophage activation syndrome in an inadequately treated patient with systemic onset juvenile idiopathic arthritis

M Juneja1, R Jain, D Mishra

  • 1Department of Pediatrics, Maulana Azad Medical College, University of Delhi, New Delhi, India. drmonicajuneja@gmail.com

Kathmandu University Medical Journal (KUMJ)
|May 27, 2010
PubMed

Insights

Macrophage activation syndrome (MAS) is a severe complication of juvenile idiopathic arthritis. Early diagnosis and treatment are crucial for survival, as illustrated by a fatal case in a 12-year-old girl.

Area of Science:

  • Pediatric Rheumatology
  • Immunology
  • Hematology

Background:

  • Macrophage activation syndrome (MAS) is a rare, life-threatening complication of childhood rheumatic disorders, most commonly systemic onset juvenile idiopathic arthritis (soJIA).
  • MAS presents with non-remitting fever, hepatosplenomegaly, lymphadenopathy, bleeding, altered mental status, and rash, mimicking soJIA flares.
  • Key laboratory findings include leucopenia, thrombocytopenia, and elevated urinary beta2 microglobulin.

Observation:

  • This report details a fatal case of MAS in a 12-year-old female with inadequately treated systemic onset juvenile idiopathic arthritis.
  • The patient exhibited typical clinical and laboratory features suggestive of MAS.

Findings:

  • The case highlights the critical need for vigilant monitoring in patients with soJIA.
  • Prompt and accurate diagnosis of MAS is essential for effective management.

Implications:

  • Early recognition and intervention in MAS can be life-saving.
  • This case underscores the importance of aggressive management strategies for MAS in pediatric rheumatic diseases.
  • Further research into optimal treatment protocols for MAS is warranted.

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