Bronchial dilatation is certainly not more serious than cancer. Although bronchiectasis is prone to recurrent infections and even life-threatening hemoptysis with blood in the sputum, long-term survival can be achieved through treatment such as anti-infection, hemostasis and, if necessary, interventional embolization of bronchial arteries. In case of unilateral bronchial dilatation and recurrent hemoptysis, if medical treatment is ineffective, thoracic surgery can be requested to control the clinical symptoms of bronchial dilatation with infection and hemoptysis. In contrast, cancer is a malignant tumor, which generally has a short survival period. Although patients undergo surgery, radiotherapy, chemotherapy and other comprehensive treatments, the trauma caused to patients is very great. Because malignant tumors cannot be controlled yet, it is still a worldwide medical problem, and medical doctors are still continuing to explore, so the mortality rate of cancer is very high, while bronchiectasis is generally not prone to death, unless complicated by severe hemoptysis and induced myocardial infarction, between the two bronchiectasis is not more serious than cancer, so there is no need to panic too much.