Lymphoma is a malignant tumor originating from lymphatic tissue, and the imaging presentation depends on the superficial lymph nodes. The first step is to look at the ultrasound. The ultrasound will show enlarged superficial lymph nodes in the neck, armpits, supraclavicular and inguinal areas, and CT examinations are usually done from the chest to the whole abdomen, and if there are enlarged lymph nodes in the mediastinum, they can be single or fused into large masses. The majority of mediastinal masses tend to be lymphomas and pulmonary infiltrates. The spleen itself is also a lymphoid tissue and may show diffuse enlargement of the spleen, with different echogenicity or density. The liver may also show hypodense nodules or diffuse changes in the liver. In addition, it can invade the abdomen, retroperitoneal lymph nodes, and mesenteric lymph nodes, all of which can be demonstrated on CT. For extranodal lymphoma, it can occur in various parts of the body, such as the lungs, breast, and in some cases, more specifically, but with a lower incidence. For example, it may occur in the vagina or uterus, and if CT is performed, these areas can show the corresponding nodes.