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Specificity of KRAS and FISH Testing
| Test | Fraction of patients without evidence of cancer and negative test result |
|---|---|
| KRAS | 50/52 (96%)* |
| FISH | 52/52 (100%) |
| Combined | 50/52 (96%) |
False-positive KRAS results were identified in two patients with diagnoses of both primary sclerosing cholangitis, and ulcerative colitis.
