Flexible sigmoidoscopy is an important screening procedure because of its a
bility to detect early changes in the distal colon. The 60-cm flexible sigm
oidoscope provides excellent visualization with minimal discomfort to patie
nts. Successful sigmoidoscopy requires adequate patient preparation, proper
equipment and an experienced examiner who can recognise both normal and ab
normal findings. Complications arising from sigmoidoscopy are rare, but pat
ients may experience some cramping, gas or watery stools. Screening and pri
mary preventive measures, including regular exercise and increased dietary
fiber intake, can lower the morbidity and mortality associated with colorec
tal cancer.