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  - Condition of the elderly
 
  - transient ischaemia of large bowel, splenic flexure most vulnerable
 
 
Presentation
  - Bout of cramp-like abdominal pain lasting a few hours
 
  - Followed by attack of rectal bleeding
    
      - dark red
 
      - no faeces
 
      - 1-3x over 12 hours
 
     
   
  - Ceases spontaneously
 
 
Differential diagnosis
 
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