Evaluation of the Sensitivity of Endoscopy to Detect Nasopharyngeal Carcinoma (NPC) in an Epstein-Barr Virus (EBV)-Based NPC Screening Project in China

Background: Epstein-Barr virus (EBV) can cause the cancer nasopharyngeal carcinoma (NPC). Early detection of NPC through screening can lead to better treatment outcomes than when it is found later. Currently, NPC is found through visual inspection with an endoscope. It is not clear how well this method works, especially for the identification of small, early cancers. Researchers want to see how well nasal endoscopy works to detect NPC compared to another method called magnetic resonance imaging (MRI). Objectives: To evaluate the sensitivity of endoscopy to detect prevalent NPC among people who screen positive for EBV antibodies. Eligibility: Participants of the NPC Early Detection Screening Program in China who: Have increased levels of EBV antibodies Are otherwise in good health and able to have an MRI procedure Design: Participants will be screened with a blood test. Participants will have a nasal endoscopy. Participants will have an MRI of the head and neck: Participants will have lesions identified by either the endoscopy or MRI biopsied and sent to a pathologist for review and diagnosis of NPC. Researchers will compare NPC detection rates by endoscopy and by MRI to see which method is better able to identify prevalent NPC. ...