I. What conditions suggest possible malignant lung disease? Irritating cough without obvious cause lasting 2-3 weeks and ineffective with conventional cough suppressant and anti-inflammatory treatment. Persistent or recurrent blood in the sputum for a short period of time with no other cause to explain. Recurrent episodes of pneumonia at the same site. Unexplained joint pain in the extremities and thickening of the terminal fingers (toes). Previous history of tuberculosis but recent change in the morphology or nature of the tuberculous lesions. Pleural effusion, especially gradual increase of hemorrhagic pleural effusion. Cancer is indeed a relatively difficult disease to treat under the current level of medical research. However, difficult to treat is not the same as incurable. With the development of medical technology, the means of treating cancer are also progressing, and various treatment methods, such as surgery, radiotherapy, chemotherapy and biological therapy, make the chance of cancer being overcome greatly. Experts remind that early detection, early diagnosis and early treatment are crucial for cancer patients. The early warning signs of cancer are summarized into five easy-to-remember “cancer signals”, namely: blood, mass, pain, burning and reduction. 1. Blood – bleeding Except for normal menstruation in women, any unexplained bleeding from any organ that persists for a long time may be an early warning signal of cancer. Unexplained nasal bleeding (excluding transient nasal bleeding caused by trauma, external force, dry weather or high blood pressure) may be nasopharyngeal cancer, blood disorders, etc.; coughing up blood, blood in sputum (excluding temporary bleeding caused by dry weather or overwork) may be lung cancer; blood in urine, especially painless hematuria, may be bladder cancer, kidney cancer; blood in stool, if accompanied by change in bowel habits, urgency (abdominal pain) If there is blood in the stool, if it is accompanied by change in bowel habits, urgency (abdominal pain, distress, need to defecate at times, heavy anus and unpleasant stool), it may be the early manifestation of colorectal cancer; bloody discharge from female nipples may be breast cancer or breast duct tumor; vaginal bleeding after menopause may be the manifestation of cervical cancer. 2. lump – abnormal lump A lump that does not go away for a long time or increases rapidly within a short period of time in superficial parts of the body, usually cancer tumors are often irregular lumps; bilateral asymmetry of breast, irregular lumps and orange peel-like changes may be a manifestation of breast cancer; 3. goiter, sudden inability to make a sound or voice suddenly becomes hoarse, in addition to looking at the thyroid gland, you should go to the oncology department to avoid thyroid cancer, laryngeal cancer from being missed. 3. Pain – Pain Long-term and persistent pain may be an early sign of cancer. Progressive increase of headache with nausea and vomiting (jet vomiting is more critical) and blurred vision may be the manifestation of brain tumor or brain metastasis of lung cancer; pain, pressure, tightness and hardness in the neck and facial edema may be caused by the obstruction of blood return due to tumor compression of superior vena cava; burning sensation behind the sternum and painful dysphagia may be the result of esophageal cancer, pancreatic cancer and gastric cancer. These may be the manifestations of esophageal cancer and cardia cancer, stomach cancer. 4.Fever Continuous fever, especially low fever, children should be alert to hematological tumors, and adults should be alert to the possibility of liver cancer, kidney cancer and other tumors. 5.Weight loss – weight loss Short-term weight loss for unknown reasons and progressive decline (excluding hyperthyroidism and diabetes) may be a tumor; if weight loss is accompanied by yellowish skin color and pain, active examination is needed to exclude the possibility of pancreatic cancer and other tumors.