interstitial therapy

in·ter·sti·tial ther·a·py

radiation therapy by means of radioactive seeds or needles implanted directly into the tissues to be irradiated.

interstitial therapy

Brachytherapy, see there.

in·ter·sti·tial ther·a·py

(in'tĕr-stish'ăl thār'ă-pē) Radiation therapy by means of radioactive seeds or needles implanted directly into the tissues to be irradiated.