患者男性，６６岁。八月前因间歇性腹痛、呕吐在外院就诊。随后发现腹部包块逐渐长大，来我院就诊，体格检查发现下腹部膨隆，正中可触及约 １５．０ｃｍ × ２０．０ｃm大小的包块，质硬有压痛，包块上下活动差，左右活动可，表面不光滑。超声检查：腹腔内、腹主动脉前方探及 The patient is male, 66 years old. He was referred to an external hospital for intermittent abdominal pain and vomiting before August. Later, it was discovered that the abdominal mass gradually grew up and came to our hospital for medical examination. The physical examination revealed that the lower abdomen bulged, and the mass can touch the mass of about 15.0cm × 20.0cm in the middle. The mass hard and tender, the mass movement up and down, left and right activities Yes, the surface is not smooth. Ultrasonography: Intra-abdominal, abdominal aorta exploration