CCTG HN.11: SPECT-CT GUIDED ELECTIVE CONTRALATERAL NECK TREATMENT (SELECT) FOR PATIENTS WITH LATERALIZED OROPHARYNGEAL CANCER: A PHASE III RANDOMIZED CONTROLLED TRIAL

This study is being done to answer the following question: Is the chance of cancer spreading or returning the same if radiotherapy to the neck is guided, by using a special imaging study called lymph node mapping (lymphatic mapping) Single Photon Emission Computed Tomography (SPECT-CT), compared to the usual treatment when radiotherapy is given to both sides of the neck?