【单选题】Which one of the following statements is incorrect about Hodgkin lymphoma? A. Hodgkin lymphoma is characterized by the presence of Reed-Sternberg (RS) cells or the variants B. Hodgkin lymphoma always manifests systemic manifestations C. Hodgkin lymphoma always arises at a single lymph node and spreads characteristically in a stepwise fashion to contiguous lymph nodes D. Hodgkin lymphoma accounts for 80% of all lymphomas

Which of the following is a malignant tumor?____ A: Fibroma B: Lymphoma C: Papilloma of skin D: Teratoma E: Lipoma

Diagnosis of Systemic JIAmust exclude A: Kawasaki Disease B: Sepsis C: Leukemia, lymphoma, neuroblastoma, cancers with systemic involvement D: All of above

某患者确诊为来源于B细胞的非霍奇金淋巴瘤（non-Hodgkin lymphoma,NHL），欲行靶向治疗，则最有价值的治疗药物是：

A 59-year-old woman developed severe abdominal pain with hypotension. Abdominal CT was taken urgently. What is the most possible diagnosis: () A: Ruptured aortic aneurysm with retroperitoneal hematoma B: Renal tumor with retroperitoneal inflammation C: Intestinal tumor with peritonitis D: Lymphoma