It may be related to the production of erythropoietin by hepatocellular carcinoma cells and is often misdiagnosed as hematological disease. Bone pain is caused by bone metastasis of hepatocellular carcinoma, which can be single or multiple, often involving vertebrae, ribs, long bones of limbs, etc. It is worth noting that bone pain can be the first symptom of primary liver cancer patients and is often misdiagnosed as other bone and joint diseases. The incidence of bone pain in hepatocellular carcinoma ranges from 3% to 12%, but the incidence of bone metastasis can reach 20% at autopsy. Benign intrahepatic occupying lesions, such as cavernous hemangioma, fatty liver, liver cysticercosis, etc., are misdiagnosed mainly because of the error of ultrasound operator in judging intrahepatic sonograms, and sometimes CT can also misdiagnose. Brain tumor and transient cerebral ischemia Both diseases have symptoms such as headache, dizziness, stumbling, and inability to move the arms and legs freely. Transient cerebral ischemic attacks are mostly caused by atherosclerosis, and the incidence is higher in patients with hyperlipidemia and diabetes. When the neck is bent forward, there is a feeling of pressure or pain in the brain, which is usually a brain tumor, brain hemorrhage or subarachnoid hemorrhage, and there is a risk of sudden death when the situation is critical, so you should go to the hospital immediately for examination and treatment. Laryngeal cancer and laryngeal polyps One type of cancer that smokers must pay attention to is laryngeal cancer. Its early symptom is hoarse voice. However, karaoke, which is popular nowadays, can also cause laryngeal polyps if singing is excessive, and it is difficult for the patients themselves to distinguish. People often go to the doctor for hoarseness of voice, but most of them are laryngeal polyps and laryngitis. If there is a week or two of persistent hoarseness, you should go to an ENT department for examination. The doctor will know if it is laryngeal cancer after looking at the inside of the throat by sound and with a laryngeal endoscope. A round edema on the vocal folds is a laryngeal polyp, while a jagged edge of the vocal folds is cancer. Some people think that it must be painful to put the laryngeal endoscope into the throat, but in fact, this endoscope is an extremely thin and soft tube, and it only takes about 5 minutes to finish the examination with almost no pain.