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Every colon shouldn’t have a silver lining: an atypical case of colitis caused by a ‘commensal’ organism
  1. Peter Rimmer1,2,
  2. George Howell2,
  3. Sara Mahgoub3,
  4. Tariq H Iqbal2,4
  1. 1Institute of Cardiovascular Sciences, University of Birmingham, Birmingham, UK
  2. 2Gastroenterology Department, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
  3. 3Liver Medicine Department, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
  4. 4Institute of Microbiology and Infection, University of Birmingham, Birmingham, UK
  1. Correspondence to Dr Peter Rimmer, Gastroenterology, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK; peter.rimmer{at}doctors.org.uk

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Introduction

A 53-year-old man was referred by his general practitioner with a 6-month history of rectal bleeding, mucous, diarrhoea and abdominal pain. There was associated tenesmus and urgency. He gave a history of alcohol excess and depression. Having spent his childhood in Mexico, he had lived in the UK throughout his adult life. He had been in a stable same-sex relationship for the past 7 years.

Examination revealed a tender right-sided inguinal lymph node. Rectal examination demonstrated a perianal skin tag but no other abnormality. The remainder of his clinical examination was normal.

Stool cultures, Clostridioides difficile testing and rectal swabs for Chlamydia and Gonorrhoea were negative. A faecal calprotectin was indeterminate at 73 µg/g. Routine blood …

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Footnotes

  • Contributors PR provided clinical care to the patient, obtained consent, oversaw the writing process including formulating the answer, amalgamating input from co-authors and identifying references. GH collated information regarding HIS from identified references and wrote an initial draft description of the condition to utilise in the answer section. SM also provided clinical care to the patient and collated the first draft of the patient history from this. THI provided senior clinical review and provided feedback and improvements to earlier versions of the document.

  • 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.