恶性淋巴瘤是原发于淋巴网状系统的恶性肿瘤。淋巴结肿大为其主要表现,尤以浅表淋巴结肿大最多见。少数患者可原发于淋巴结以外部位,以侵犯前列腺和盆腔淋巴组织引起肾后梗阻极为罕 Malignant lymphomas are malignant tumors that originate in the lymphatic reticular system. Lymph node enlargement is its main manifestation, especially in superficial lymphadenopathy. A small number of patients may have primary origin outside the lymph nodes to invade the prostate gland and cause pelvic lymphoid tissue that causes postrenal obstruction.