The ideal management of suspected colon perforation following colonoscopy r
emains elusive because the incidence is only 0.1 to 2.0 per cent. The patie
nt with obvious perforation deserves immediate exploration, but the patient
with equivocal findings poses a diagnostic dilemma. We propose an algorith
m based on the results of water-soluble contrast enema that allows for rapi
d, definitive surgical decision-making. If perforation is confirmed, early
operation allows for primary repair without resection or colostomy, or if n
o perforation is identified, medical management can be undertaken with conf
idence. This algorithm should ensure that the surgical management of this p
otentially lethal complication is not unnecessarily delayed.