Sigmoidoscopy bowel-screening method urged for New Zealand
Friday 12 February 2016
An effective national bowel screening programme involving a single test, a sigmoidoscopy, could be introduced in New
Zealand within 12 months.
In an Editorial in the New Zealand Medical Journal today, The University of Otago’s Associate Professor Brian Cox, from the Hugh Adam Cancer Epidemiology Unit, describes
how this could be achieved.
“This would involve a single test, flexible sigmoidoscopy, just once at about 60 years of age,” he says.
“There is very strong evidence this would reduce a person's risk of dying of bowel cancer by 43% and reduce their risk
of future development of bowel cancer by 33%. This is much greater protection from bowel cancer than the proposed
programme of the Ministry of Health."
He adds that the Ministry of Health’s dogged pursuit of bowel screening based on two-yearly testing for blood in the
faeces is “letting the public down”.
“Despite all the evidence over the past 6 years, they have not even trialled screening by flexible sigmoidoscopy.
"The testing of faeces for blood is designed to detect existing bowel cancers only and not preventing the disease,
whereas pre-invasive polyps can be seen and removed at examination by flexible sigmoidoscopy,” he writes.
In addition, the load on gastroenterology services is much lower with one-off flexible sigmoidoscopy and, due to the
reduction in the incidence of bowel cancer achieved, results in a much more economical screening programme.
“It seems very odd that, despite being a better screening test that would produce a much more economical screening
programme, the Government continues to support the approach of two-yearly faecal occult blood testing.
"The continuing delay in the introduction of once-in-a-lifetime flexible sigmoidoscopy screening is worrying. Why should
a general practitioner continue to be denied the opportunity to refer their patients for a 20-minute screening test that
offers the best protection from bowel cancer for their patients?"
ends