患者，女性，38岁。一周前体检，上腹部发现肿块B超及CT检查均提示肿块呈实质性，拟诊：（1）肝脏肿瘤；（2）腹膜后肿瘤。近1月来，感中上腹不适，问胀，饮食后加重。查体：一般情况好，全身浅表淋巴结无肿大，中上腹可见隆起，可触及直径约8cm球形肿物，光滑质中，轻度活动， Patient, female, 38 years old. A physical examination a week ago, the upper abdomen found that mass B-ultrasound and CT examinations all suggested that the mass was substantial, and was supposed to diagnose: (1) liver tumor; (2) retroperitoneal tumor. In the past January, I felt a discomfort in my upper abdomen, I asked about swelling, and I became aggravated after eating. Physical examination: The general situation is good, there is no enlargement of the superficial lymph nodes in the whole body, and uplift is seen in the middle upper abdomen, which can touch a spherical mass of about 8cm in diameter, smooth mass, mild activity,