700 breast cancer patients join study to track how CDK4/6 drugs work in real life

NCT ID NCT04526587

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study follows 700 adults with advanced or metastatic breast cancer who are taking CDK4/6 inhibitors (ciclib drugs). Researchers collect blood, tissue, and fluid samples to understand how the cancer responds, why resistance develops, and how well patients do over time. The goal is to learn more about the disease and improve future treatment decisions.

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Conditions

The condition(s) this trial relates to.

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Contacts and locations

Locations

  • Roswell Park Cancer Institute

    RECRUITING

    Buffalo, New York, 14263, United States

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Other studies related to the condition(s) this trial covers.