A 71-year-old woman presented to the emergency department, 6 days following a diagnostic colonoscopy (arranged following a routine-surveillance, positive, faecal occult blood test). She complained of lower abdominal pain and left-sided chest and shoulder pain, beginning on the first day following colonoscopy, associated with looking pale and feeling lethargic. Her general practitioner (GP) had prescribed oral antibiotics for a presumed lower respiratory tract infection.Her past medical history included atrial fibrillation, treated with sotalol and warfarin; a monitored abdominal aortic aneurysm (AAA); and treated hypothyroidism and hypercholesterolaemia. Her warfarin prescription had been ceased 5 days prior to colonoscopy (although her