Lymphoma is a malignant tumor originating from lymphatic tissues, medically known as malignant lymphoma, or what people usually call “lymphoma”. It is one of the ten most common malignant tumors in China. In recent years, there has been a rapid development in the treatment of lymphoma, which has enabled more lymphoma patients to benefit from the treatment. When you are faced with the examination report, how to accurately understand the disease? Staging of lymphoma Stage 1: Lymphoma is confined to one lymph node or lymphatic region, such as invading only the supraclavicular fossa. This is called early stage cancer. Stage 2: The lymphoma has invaded two or more lymph nodes or lymphatic areas, but is still on the upper or lower side of the diaphragm, such as the supraclavicular fossa and the lymph nodes at the back of the neck. This is called local spread. Stage 3: The cancer cells are scattered on both sides of the diaphragm (upper and lower sides). This is called “extensive” spread. Stage 4: The lymphoma has metastasized to one or more body organs, including the bones, bone marrow, skin, liver, and lungs. This is called widespread metastatic cancer. There are two types of lymphoma: B-cell (B-lymph nodes) and T-cell (T-lymph nodes). Each of these types is divided into two types: (1) Chronic lymphoma – very slow growing. (2) Aggressive lymphoma – grows very fast. When doctors explain lymphoma, they usually use these two terms. 2. Hodgkin’s lymphoma (HL) It is much like non-Hodgkin’s lymphoma, but it is different. For example, the patient’s body produces an abnormal type of cell – called Reed-Sternberg cells. Unlike non-Hodgkin’s lymphoma, these cancer cells spread through the body in a more sequential manner. Depending on the patient’s symptoms, lymphomas can be divided into three categories: (1) those that are asymptomatic. (2) Those with the following symptoms: fever, chills, night sweats (sweat soaking through clothes in the morning), itchy skin and weight loss. (3) Lymphoma that spreads directly from a lymph node to an organ.