Splenic artery pseudoaneurysm
Splenic artery pseudoaneurysms are rare.
Unlike splenic artery true aneurysms, splenic artery pseudoaneurysms will nearly always present with symptoms 2.
While they are sometimes grouped under splenic arterial aneurysms, they are distinct entity and are different from true aneurysms of the splenic artery. In contrast to a true aneurysm the pseudoaneurysm wall contains only the intimal and medial layers 2.
Their size can vary and if larger than 5 cm they are called giant splenic artery pseudoaneurysms 3.
They usually occur as a complication of 1-2:
In the case of pancreatitis, the pancreatic enzymes are thought to cause a necrotising arteritis with destruction of vessel wall architecture and fragmentation of elastic tissues.
- 1. Tessier DJ, Stone WM, Fowl RJ et-al. Clinical features and management of splenic artery pseudoaneurysm: case series and cumulative review of literature. J. Vasc. Surg. 2003;38 (5): 969-74. doi:10.1016/S0741 - Pubmed citation
- 2. Agrawal GA, Johnson PT, Fishman EK. Splenic artery aneurysms and pseudoaneurysms: clinical distinctions and CT appearances. AJR Am J Roentgenol. 2007;188 (4): 992-9. doi:10.2214/AJR.06.0794 - Pubmed citation
- 3. Goldberg RF, Maley W, Kennedy EP et-al. Giant splenic artery pseudoaneurysm. J. Gastrointest. Surg. 2011;15 (6): 1063-6. doi:10.1007/s11605-010-1388-3 - Pubmed citation
- 4. Saba L, Anzidei M, Lucatelli P et-al. The multidetector computed tomography angiography (MDCTA) in the diagnosis of splenic artery aneurysm and pseudoaneurysm. Acta Radiol. 2011;52 (5): 488-98. doi:10.1258/ar.2011.100283 - Pubmed citation