BMJ Case Reports 2018; doi:10.1136/bcr-2017-222793
  • Rare disease

Unexplained bruising: a developing story

  1. Isabelle Li Kam Wa
  1. Department of Paediatrics, Homerton University Hospital NHS Foundation Trust, London, UK
  1. Correspondence to Dr Lucy Backhouse, lucy.backhouse{at}
  • Accepted 10 March 2018
  • Published 14 May 2018


We present the case of a 10-month-old male infant who presented to accident and emergency with unexplained bruising of the ear. Initial blood tests showed no clotting or platelet abnormalities and non-accidental injury investigation commenced. He was subsequently reviewed by the dermatology team who suggested the diagnosis of acute haemorrhagic oedema of infancy presumably triggered by a viral or bacterial infection, and the clinical findings fit this diagnosis.


  • Contributors All authors contributed equally to the case study report. DF wrote the the case presentation. ILKW researched and wrote the discussion. LB wrote the differential diagnosis, summary and edited the case report.

  • 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.

  • Patient consent Parental/guardian consent obtained.

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

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