The American Cancer Society now recommends a blood test as a colorectal cancer screening option for adults who decline visual or stool tests.
The Shield test detects tumor DNA in blood with 83% sensitivity for colorectal cancer but is less effective at catching precancerous polyps.
One in three eligible adults still hasn't been screened as colorectal cancer becomes the leading cancer killer among US adults under 50.
AI-generated summary was reviewed by a CNN editor.
The American Cancer Society is adding some new testing options to its screening guideline for colorectal cancers – and for the first time, that includes a blood test.
