Clinical trial: NCT02584790
Section: Possible Risks, Discomforts, and Inconveniences
Subsections: Risk:

This is a non-invasive, painless procedure. The NBI wavelength is no harm to human. There is no major risk during the NBI endoscopy examination, but it may cause mild discomfort due to the slightly prolonged endoscopy examination time. It is a voluntary study, for those patients who are participating in can withdraw from this study at any time without providing any reasons. It will not affect the current and subsequent follow up and treatment. If you have any enquiry, please feel free to contact our department Dr. Fergus Wong (25956111). For subject rights enquiries, please feel free to contact HKEC Ethics Committee (25956111) Patient's signature Patient's name
Clinical trial: NCT02584790
Section: Procedures
Subsections: Workflow:

All newly confirmed NPC patients will undergo endoscopic examination (both white light and NBI) with images captured. At 8th week after completion of radiotherapy, those patients will undergo endoscopic examination again (both white light and NBI), with images captured and biopsy of the nasopharynx taken. All nasopharynx biopsy negative result cases will be treated as no post-radiotherapy mucosal residual NPC.
Clinical trial: NCT02584790
Section: Purpose of Research
Subsections: Objective:

This is a prospective study including 50-70 subjects which aims to analyze the endoscopic features of post-radiotherapy musical residual NPC using NBI system, and to establish the positive predicted value, negative predicted value, sensitivity and specificity of using both normal white light endoscopy and NBI system for detecting mucosal residual NPC.