Nasopharyngeal Cancer is a rare type of cancer that occurs in the nasopharynx, which is located behind your nose and above the back of your throat. Certain diets, infections, and genetic factors can increase your chance of developing Nasopharyngeal Cancer. Symptoms include a lump in the neck, hearing loss, tinnitus, a blocked orĀ stuffy nose, nosebleeds, headaches, double vision, numbness in the bottom part of your face, swallowing problems, a hoarse voice, and unintentionalĀ weight loss.