Tatsuma Fukuda,Toshiaki Mochizuki, Norio Otani, Naoki Yahagi and Shinichi Ishimatsu
Non-traumatic hemoperitoneum is often caused by vascular lesions. In some of the diseases which cause vascular lesions, the lesions are presented systemically. We report a 34-year-old man with non-traumatic hemoperitoneum due to dissection of splenic artery. He had systemic vascular lesions, including a dissecting aneurysm in left common iliac artery. We found the iliac arterial lesion in advance; therefore we could avoid potentially lethal complications accompanied by examination and treatment of the splenic artery lesion. In non-traumatic hemoperitoneum, it is important to confirm that other vascular lesions are not present between the puncture site for cannulation and target lesion.