Diseases in the department of internal medicine usually include six major systems: 1) gastroenterology diseases; 2) circulatory diseases; 3) respiratory diseases; 4) hematology diseases; 5) neurology diseases; and 6) endocrinology diseases. Usually gastroenterology diseases include acute gastroenteritis, cholecystitis, pancreatitis, dyspepsia, upper gastrointestinal bleeding, peritonitis, appendicitis and other diseases. Usually circulatory internal diseases include coronary heart disease, myocarditis, pericarditis, heart valve disease, congenital heart disease and other diseases. Respiratory internal diseases include pharyngitis, bronchitis, bronchiectasis, pneumonia, tuberculosis, and lung cancer. Endocrinology diseases include diabetes, thyroid disease, endocrine disorders and other diseases. Hematologic diseases include various anemias, leukemia, and hematologic tumors. Finally, neurological diseases may include cerebral infarction, cerebral embolism, cerebral artery blood supply deficiency and other diseases.