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Sore knee – why and when to call a cardiologist
  1. Ian Scott Kendall,
  2. Claire McGinn,
  3. Andrew J Sands
  1. Paediatric Cardiology, Royal Belfast Hospital for Sick Children, Belfast, UK
  1. Correspondence to Dr Ian Scott Kendall, PAEDIATRICS, Royal Belfast Hospital for Sick Children, Belfast, BT12 6BA, UK; scttkendall{at}


A young girl received a diagnosis of septic arthritis of the knee unresponsive to standard medical and surgical treatment. We report the patient’s clinical journey with clinical commentary throughout, underlying the importance of differential diagnosis that may open several scenarios and a different final diagnosis accordingly. Finally, we will discuss the treatment and management of the patient’s final diagnosis.

  • Rheumatic fever
  • Paediatrics
  • Cardiology

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  • Contributors ISK and CMG wrote the article. AJS edited the article.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Provenance and peer review Not commissioned; externally peer reviewed.