TESTS for blood in the stool vary in sensitivity; it is generally agreed that the unmodified benzidine test gives a positive reaction if the patient has eaten meat, but the guaiac test is not ...

Although European controlled trials of screening with a nonrehydrated guaiac-based fecal occult blood test (gFOBT) have shown it reduces colorectal cancer (CRC) deaths, real-world results could differ ...

October 9, 2008 — Stool DNA testing is a new approach to screening for colorectal cancer, but it is an evolving technology. A study has found that the first-generation stool DNA test (SDT-1) is not ...

Q: I just had a physical and my doctor did a new test in the office to check for blood in my stool. He said that the test we’ve been doing for years isn’t very good. Can you explain what he meant by ...