Awada Zeinab, Al Moussawi Hassan, Alsheikh Mira
Internal Medicine, Lebanese American University-Medical Center, Beirut, LBN.
Internal Medicine, Staten Island University Hospital, Staten Island, USA.
Cureus. 2019 Jan 7;11(1):e3833. doi: 10.7759/cureus.3833.
Visceral artery aneurysms (VAAs) and visceral artery pseudoaneurysms (VAPAs) are defined as more than a 1.5 fold increase in the normal diameter of the celiac, superior, or inferior mesenteric arteries and their branches. They represent a rare finding with an incidence ranging between 0.1% to 0.2%. Depending on the mechanism of formation, aneurysms can be divided into true aneurysms or pseudoaneurysms. True aneurysms involve all layers of the wall, which are usually thinned but remain intact and commonly result from vessel wall abnormalities. However, pseudoaneurysms occur after vascular injuries or nearby inflammatory process causing a tear in the vessel wall. Pancreatitis is the most common cause of pseudoaneurysm. Nevertheless, other conditions, such as autoimmune disorders, vascular interventions, laparoscopic cholecystectomy, and even hepatic transplantation, have been reported to increase the risk of pseudoaneurysm formation. Herein, we are reporting a case of a gastroduodenal artery pseudoaneurysm rupture in a patient with altered anatomy secondary to Billroth II surgery.
内脏动脉瘤（VAA）和内脏动脉假性动脉瘤（VAPA）定义为腹腔干、肠系膜上动脉或肠系膜下动脉及其分支的正常直径增加超过1.5倍。它们是一种罕见的发现，发病率在0.1%至0.2%之间。根据形成机制，动脉瘤可分为真性动脉瘤或假性动脉瘤。真性动脉瘤累及血管壁的所有层，这些层通常变薄但仍保持完整，通常由血管壁异常引起。然而，假性动脉瘤发生在血管损伤或附近炎症过程导致血管壁撕裂之后。胰腺炎是假性动脉瘤最常见的原因。尽管如此，据报道，其他情况，如自身免疫性疾病、血管介入、腹腔镜胆囊切除术，甚至肝移植，都会增加假性动脉瘤形成的风险。在此，我们报告一例因毕Ⅱ式手术后解剖结构改变导致胃十二指肠动脉假性动脉瘤破裂的病例。
