The DISCOVER Study: Evaluating the GRAIL Galleri MCED Test for Cancer Detection

The DISCOVER Study is evaluating a blood test called the GRAIL Galleri MCED test. This test looks for signs of many different types of cancer early. You might be able to join if you are at least 22 years old and have symptoms or imaging results that suggest cancer. The study aims to see how well this test can find cancer, what type of cancer it detects, and at what stage, all within 12 months of testing. This is a pilot study, meaning it's an initial evaluation, and it plans to include about 100 people.

Study design
This is an interventional study, meaning participants will receive a specific intervention (the GRAIL Galleri MCED test). It plans to enroll about 100 people.
What's involved
You would have a screening visit to check eligibility, an in-clinic visit, blood tests, and fill out questionnaires.
Compensation
Not stated in the trial record.
Follow-up
The study will follow up on diagnostic resolution and cancer type determination within 12 months after the MCED test.

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NCT07390643

The DISCOVER Study

Not Yet Recruiting
NAAges 22+InterventionalScreening
Dana-Farber Cancer Institute
~100 participants
Updated 2026-02-05 on ClinicalTrials.gov
What's tested:GRAIL Galleri MCED test

At a glance

Recruiting sites
0 of 1 listed site is recruiting right now
RecruitingSuspended, closed, or not yet open
What they're measuring
Multi-cancer Early Detection (MCED) Positive Cancer Type
Measured over MCED testing will be performed at enrollment, with diagnostic resolution and cancer type determination expected within 12 months.
+5 more outcomes measured
Cancer
Cancer Diagnosis
1 sites across 1 states
Massachusetts1
  • Elizabeth O'Donnell, MD · PRINCIPAL_INVESTIGATOR · Dana-Farber Cancer Institute

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Eligibility criteria

Inclusion

Be at least 22 years old
Have signs and symptoms suggestive of cancer and/or have imaging related to signs and symptoms of cancer being evaluated in the Cancer Diagnostic Service clinic

Exclusion

Individuals diagnosed with invasive malignancy within 3 years of enrollment
Individuals with active cancer requiring active therapeutic intervention at the time of participation (hormone therapy for breast/prostate cancer is considered acceptable and will not preclude participation)
  • Multi-cancer Early Detection (MCED) Positive Cancer TypeMCED testing will be performed at enrollment, with diagnostic resolution and cancer type determination expected within 12 months.

    MCED positive cancer type is defined as the type of cancer detected by the MCED test. Cancer type will be defined and recorded using ICD-O-3 codes for primary anatomic site (topography) and histology (morphology).

  • Multi-cancer Early Detection (MCED) Positive Cancer IncidenceMCED testing will be performed at enrollment, with diagnostic resolution and cancer type determination expected within 12 months.

    MCED positive cancer incidence is defined as the number of cancers detected by the MCED test.

  • Multi-cancer Early Detection (MCED) Positive Cancer StageMCED testing will be performed at enrollment, with diagnostic resolution and cancer type determination expected within 12 months.

    MCED positive cancer stage is defined as the stage of cancer detected by the MCED test.

  • Multi-cancer Early Detection (MCED) Undetected Cancer TypeMCED testing will be performed at enrollment, with diagnostic resolution and cancer type determination expected within 12 months.

    MCED undetected cancer type is defined as the cancer type detected by standard diagnostic methods that was not identified by the MCED test. Cancer type will be recorded using ICD-O-3 codes for both the primary anatomic site (topography) and histology (morphology).

  • Multi-cancer Early Detection (MCED) Undetected Cancer IncidenceMCED testing will be performed at enrollment, with diagnostic resolution and cancer type determination expected within 12 months.

    MCED undetected cancer incidence is defined as the number of cancers detected by standard diagnostic methods that was not identified by the MCED test.

  • Multi-cancer Early Detection (MCED) Undetected Cancer StageMCED testing will be performed at enrollment, with diagnostic resolution and cancer type determination expected within 12 months.

    MCED undetected cancer stage is defined as the stage of cancer detected by standard diagnostic methods that was not identified by the MCED test. Hodgkin lymphoma (HL) is typically staged using the Ann Arbor system; non-Hodgkin lymphoma (NHL) is staged according to the Lugano classification; multiple myeloma (MM) is staged using the International Staging System (ISS); and chronic lymphocytic leukemia (CLL) is staged according to the Rai staging system.