Medically PTHC may mean post-transfusion hepatitis C or percutaneous transhepatic cholangiography. It needs to be judged according to the specific context. Post-transfusion hepatitis C, i.e., hepatitis C caused by the transfusion mode of transmission. People presenting with post-transfusion hepatitis C tend to have an insidious onset of the disease, with malaise and nausea as the most common symptoms, which cannot be brought to the patient’s attention or are masked by symptoms of other diseases, so most patients are only detected during a physical examination. Percutaneous transhepatic cholangiography (PTHC) is an examination technique, which is a more advanced method for the diagnosis and treatment of diseases of the hepatobiliary system, and is mainly used to determine whether there is any obstruction of the biliary tract and to understand the situation of the obstruction, which is conducive to the diagnosis and treatment of the disease. Therefore, the meaning of PTHC needs to be judged according to the specific context.