MedicalTerminology DB

Meaning of partial-breast irradiation: A type of radiation therapy given only to the part of the breast that has cancer in it.

Definition of partial-breast irradiation

A type of radiation therapy given only to the part of the breast that has cancer in it. Partial-breast irradiation gives a higher dose over a shorter time than is given in standard whole-breast radiation therapy. Partial-breast irradiation may be given using internal or external sources of radiation. Also called accelerated partial-breast irradiation.

Written and maintained by James Murray Last updated July 21, 2026 Educational reference, not medical advice. Read the limitations.

For learning, not diagnosis. This glossary provides general educational information and is not a substitute for advice from a qualified healthcare professional. If you may be experiencing a medical emergency, contact local emergency services.