My father is coming 90 years old and has been diagnosed with parotid gland cancer.At the moment he is eating well no weight loss and no particular adverse symptoms. He has seen the consultant who has told him it is high risk surgery and told him the possible side effects he has his preassessment tomorrow but he is not sure if he wants the surgery if he is passed fit for it .If he does not have the surgery what can we expect as the cancer progresses.