INTRACAVITARY RADIOTHERAPY BOOSTING FOR NASOPHARYNX CANCER

Intracavitary radiotherapy is conceptually an attractive method of boo sting dose to nasopharynx cancer whilst sparing sensitive normal tissu es. A high dose rate (HDR) microselectron can be used to deliver a bra chytherapy boost conveniently, safely, comfortably aad effectively. Fo llowing external radiotherapy a single outpatient treatment has been g iven to patients using the remote afterloading system of sources place d in modified paediatric endotracheal tubes. This has been associated with good primary control and no evidence of serious morbidity in eigh t patients. The main limitation of this method is restriction of its u tilization to small volume primary disease.