Lymphoma is a malignant tumor originating from the lymphatic system. The main clinical manifestation is painless lymph node enlargement, which can occur in superficial lymph nodes such as in the neck, armpits, or groin, as well as deeper lymph nodes in the mediastinum or abdominal cavity. In pediatric patients with lymphoma, a significant number also present with abdominal pain, intestinal obstruction, or intussusception, which often indicates intestinal lymphoma. If children exhibit lymph node enlargement or deep lymph node enlargement is discovered through imaging studies, it is necessary to perform a puncture or biopsy and conduct a pathological examination to further confirm whether it is lymphoma.