Lymphatic cleansing refers to removing the lymph nodes around the tumor while removing the tumor for patients with solid tumors in the clinic, and observing whether the surrounding lymph nodes have been invaded, so as to decide the scope of the next step of treatment or judge the prognosis. Lymphatic dissection is commonly used in the treatment of various solid tumors, such as patients with gastric cancer and patients with liver cancer. However, for hematologic malignant tumors, such as lymphoma, lymphatic cleansing cannot be performed. The tumor of lymphoma patients is systemic, and all lymph nodes of the whole body are malignant, so it cannot be cleared by surgery, and it can only be carried out by systemic treatments, such as chemotherapy, radiotherapy, and hematopoietic stem cell transplantation therapy. Lymphatic clearance should only be used in the treatment of most solid tumors.