An unusual developmental anomaly of duplicated portal vein
Abstract
Background: Portal vein (PV) duplication is a rare developmental anomaly but has an important role in the diagnosis and management of disease for radiologists and surgeons.
Materials and methods: A new variant of PV duplication with vein fenestration leading to choledochal stenosis and dilatation and thrombus was identified by computed tomography angiography (CTA) on a 59-year-old woman with a history of gallstones.
Results: A second PV originated from the superior mesenteric vein (SMV), split into two branches that encircling the common bile duct to form a vein fenestration, leading to choledochal stenosis and dilatation, with thrombus formation at the confluence.
Conclusions: This case report adds to the existing body of knowledge about the variation of the PV system. We present an embryological perspective for the case, which suggests the possibility of similar occurrences.
Keywords: portal vein duplicationvariationcomputed tomography angiography
References
- Contrera KJ, Aygun N, Ward BK, et al. Internal jugular vein duplication and fenestration: case series and literature review. Laryngoscope. 2016; 126(7): 1585–1588.
- Dighe M, Vaidya S. Case report. Duplication of the portal vein: a rare congenital anomaly. Br J Radiol. 2009; 82(974): e32–e34.
- Kitagawa S. Anomalous duplication of the portal vein with prepancreatic postduodenal portal vein. J Rural Med. 2022; 17(4): 259–261.
- Marks C. Surgical implications of portal venous system malformation. Ann R Coll Surg Engl. 1974; 55(6): 299–306.
- SNAVELY JG, BREAKELL ES. Fatal hemorrhage from esophageal varices, due to malformations and congenital stenoses in portal venous system. Am J Med. 1954; 16(3): 459–464.
- Yang DMo, Kim HC, Kim SW. Hepatic fat accumulation with sparing associated with portal vein duplication. Clin Imaging. 2014; 38(4): 550–552.
- Yang Q, Li J, Wang H, et al. A rare variation of duplicated portal vein: left branch derived from splenic vein mimicking cavernous transformation. BMC Gastroenterol. 2021; 21(1): 404.