The results of a tissue biopsy directly shape the entire treatment pathway. Specific ways it changes clinical decision-making include:

Confirming or ruling out cancer: A biopsy result determines whether a patient proceeds toward cancer treatment at all, avoiding unnecessary therapy for benign conditions
Guiding treatment selection: Identifying the cancer type, grade, and specific gene mutations allows doctors to choose targeted therapies, chemotherapy regimens, or determine whether surgery or radiation is appropriate
Staging the disease: Tissue findings, combined with imaging, help doctors determine how advanced the cancer is, which affects treatment intensity and prognosis
Establishing a baseline for comparison: The original tissue biopsy result serves as a reference point against which future test results, including liquid biopsy results, can be compared
Confirming eligibility for clinical trials: Many clinical trials require specific molecular or genetic findings from tissue biopsy before a patient can enroll