A soreness of the throat or a persistent cough. A persistent cough is one of the initial symptoms of throat cancer. If the cough becomes chronic, it could indicate, instead, a cancer of the lung or of some other region of the body, including the thyroid or the larynx. Since a cough is a fairly common symptom of a number of innocuous respiratory diseases, the gauge of its severity is how long it lasts. A cough that goes away in a little while is nothing more than a mild respiratory disorder, such as a cold. However, a cough that is chronic and persists for a long time is definitely a symptom of something more serious.
Issues with breathing. Research studies done in the United Kingdom found that between half to nearly three quarters of all those who suffer from throat cancer will have serious issues with their breathing. If the sound that you make while breathing changes to a considerable extent from your norm, and especially if it is high pitched or extremely loud, it could be a symptom of a serious condition. Problems in breathing and noisy breathing occur when a cancer of the larynx constricts the voice box, or else the vocal cords themselves.