The findings run counter to historical data and may provide fodder to reconsider current guideline recommendations on surveillance of colorectal cancer patients.
The WHO said that the list is intended to serve as a reference for countries to update or develop their own list of essential diagnostics.
The updated recommendations discuss testing for DNA repair gene mutations, MSI-H, and dMMR, as well as germline testing and counseling.
The guidelines are the first to attempt to specify which drugs are appropriate to test for routinely, guideline authors say.
Qualitative testing offers more specificity and sensitivity than current frontline immunoassay-based testing, the group said in its guidelines.
According to a presentation at the College of American Pathologists' annual meeting, around 62 percent of lab testing errors occur during the preanalytical phase.
With only one test FDA-approved for primary hrHPV screening, groups express concern about feasibility of moving away from co-testing
GHTC, an advocacy group, said that member nations must contribute needed financial resources so that WHO can implement an effective diagnostics guide.
The incidence of thyroid cancer has gone up 4.5 percent annually during the past decade without a corresponding change in the mortality rate, the USPSTF noted.