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Serum Laboratory Studies, Stool Test, Breath Test01:30

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Gastrointestinal (GI) diagnostic studies are pivotal in confirming, ruling out, diagnosing, or staging various diseases, including cancers. Following diagnosis, allocating time for discussions with the patient and providing informational resources is crucial. Diagnostic assessments of the GI tract often occur in outpatient settings like endoscopy suites or GI labs. Preparation for these tests may include dietary restrictions, fasting, liquid bowel preparations, laxatives, enemas, and the...
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Multicancer Detection Tests for Screening : A Systematic Review.

Leila C Kahwati1, Matthew Avenarius2, Leslie Brouwer2

  • 1RTI-University of North Carolina Evidence-based Practice Center, Research Triangle Park and Chapel Hill, North Carolina; and RTI International, Research Triangle Park, North Carolina (L.C.K., R.C.W.).

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This summary is machine-generated.

Multicancer detection (MCD) blood tests show variable accuracy, but evidence on screening benefits and harms in asymptomatic adults is currently insufficient. Further research is needed to establish their clinical utility.

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Area of Science:

  • Oncology
  • Genomics
  • Medical Diagnostics

Background:

  • Screening for multiple cancers using a single blood test offers transformative potential.
  • Blood-based multicancer detection (MCD) tests aim to identify various cancers early.

Purpose of the Study:

  • To evaluate the benefits, accuracy, and harms of MCD tests in asymptomatic adults.
  • To synthesize evidence on the performance of MCD tests for cancer screening.

Main Methods:

  • Systematic review of controlled studies, diagnostic accuracy studies, and harms assessments.
  • Searched MEDLINE, Cochrane Library, and trial registries through March 2025.
  • Data extraction and risk of bias assessment performed by independent reviewers.

Main Results:

  • No controlled studies reported on the benefits of MCD screening.
  • Twenty studies assessed the accuracy of 19 MCD tests, with sensitivity ranging from 0.095 to 0.998 and AUC from 0.52 to 1.0.
  • Accuracy varied by test and study design; diagnostic performance estimates may not apply to screening.

Conclusions:

  • Evidence is insufficient to evaluate the benefits, harms, or definitive accuracy of MCD tests for cancer screening.
  • The clinical utility of MCD tests requires further investigation through well-designed controlled studies.