Internal systemic radiation therapy involves injecting radioactive isotopes either into a vein or into an organ.

Internal (interstitial) radiation therapy (brachytherapy) uses radioactive material contained in tiny tubes, wires, or beads.

A clinical trial of external radiation therapy and one of the following: Internal radiation therapy.

Internal radiation therapy uses a radioactive substance sealed in needles, seeds, wires, or catheters that are placed directly into or near the cancer.

Internal radiation therapy for cancer that remains after treatment with external-beam radiation therapy.

Internal radiation therapy for medically inoperable patients.

Internal radiation therapy for women who cannot have surgery.

Internal radiation therapy with or without external radiation therapy.

Internal radiation therapy with surgery (neck dissection).