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Home >Information for Patients > Dictionary Index

Dictionary of Cancer Terms

View in Spanish: Terapia de tercera línea

Third-line therapy (THAYR-uh-pee)
Treatment that is given when both initial treatment (first-line therapy) and subsequent treatment (second-line therapy) don’t work, or stop working.

Source: National Cancer Institute Dictionary of Cancer Terms, available at www.cancer.gov/dictionary.