External radiation therapy is used in combination with chemotherapy for curative purposes. It can also be used in combination with endocavitary therapy for curative and palliative purposes, or alone as palliative treatment.
It is normal to group squamous cell carcinomas and adenocarcinomas as one with regards to radiation therapy. Both are moderately sensitive to radiation. Radiation therapy serves both curative and palliative treatment purposes.
For curative radiation therapy, it is important to uphold the planned treatment duration.
- Eliminate tumor - cure
- Reduce tumor volume – palliation
- Relieve tumor symptoms - palliation