Leukemia is the most common malignant neoplastic disease of the hematological system, and there are two clinical categories: acute leukemia and chronic leukemia. Acute leukemia is usually detected within a month or so, because acute leukemia tends to progress rapidly, and the patient will show a series of symptoms such as anemia, infection, bleeding, organ infiltration, etc. These symptoms often draw the attention of the patient and his or her family, and the patient will be examined in the hospital, and abnormalities will be found through routine blood tests, and eventually the diagnosis of acute leukemia will be confirmed through bone marrow aspiration. However, patients with chronic leukemia often take longer to be detected, sometimes as long as six months or so. Because chronic leukemia progresses slowly, the patient’s symptoms are not prominent, and some patients only show mild weakness, lethargy, night sweats, such as chronic granulocytic leukemia, many people are diagnosed only when an abnormal increase in white blood cells is found during routine physical examinations, so chronic leukemia takes a longer time to detect, sometimes around six months.