Avoid investigations such as imaging, blood tests, endoscopies, etc., to detect early asymptomatic recurrence after curative cancer treatment unless such follow-ups have a proven impact on prognosis or quality of life

Rationale:

In some cases, early identification of cancer recurrence after curative treatment may increase the likelihood of further curative treatment. In other cases, early detection will not improve the chances of life-prolonging or curative treatment. 

References:

• Earle C, et al. Follow-up care, surveillance protocol, and secondary prevention measures for survivors of colorectal cancer [Internet]. 2012 Feb 3 [cited 2014 Sep 23].
• Fahy BN. Follow-up after curative resection of colorectal cancer. Ann Surg Oncol. 2014 Mar;21(3):738-46. PMID: 24271157.
• Grunfeld E, et al. Routine follow up of breast cancer in primary care: randomised trial. BMJ. 1996 Sep 14;313(7058):665-9. PMID: 8811760.
• Nasjonale faglige retningslinjer (Helsedirektoratet.no)