Early stage laryngeal cancer patients can achieve both treatment of the tumor and preservation of vocal function through radiotherapy alone. The most critical issue is whether it can be detected and diagnosed at an early stage. So, how to detect laryngeal cancer at an early stage? Here are some characteristics of early laryngeal cancer: 1. Hoarseness: Hoarseness is the earliest signal of laryngeal cancer. Laryngeal cancer is a tumor growing on the vocal cords, and even if the size is small, hoarseness will occur. Any adult with unexplained hoarseness that lasts for more than two weeks should have a careful laryngeal examination and should not be taken lightly. This hoarseness may sometimes have some relief, but it will always be there. Do not mistake it for “cold” or “laryngitis” because it is not painful or itchy. Abnormal sensation of throat: foreign body sensation, urgency or swallowing discomfort are the early symptoms of supraglottic laryngeal cancer. However, the symptoms of this type of cancer are often not obvious at the beginning. Tracing the medical history, it may be several months long. Therefore, if foreign body sensation occurs in the throat, it should be promptly checked by a doctor for early detection of laryngeal lesions. 3. Coughing or coughing with blood: Irritating cough or blood in sputum can be produced due to subglottic tumor irritation. Early patients often have discomfort in the larynx. It is possible that some patients may put their attention on the lung disease and delay the diagnosis. Therefore, the occurrence of cough with blood in sputum should also be examined in the larynx. Anyone over the age of 40 who also presents with the above symptoms is advised to see a doctor for a simple indirect laryngoscopy as soon as possible to detect the problem early.