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Introduction: Portal vein aneurysm (PVA) is a rare saccular or fusiform portal vein dilatation. The management and optimal treatment of PVA remain unknown. Case Presentation: A 53-year-old man with hepatitis C virus (HCV) infection was diagnosed with PVA measuring 28 mm in diameter. Under observation, his liver fibrosis progressed, and the PVA diameter gradually increased to 52 mm. The patient was treated with elbasvir-grazoprevir for 12 weeks, and HCV disappeared. After achieving sustained virological response, liver fibrosis improved and the PVA progression ceased. Conclusion: HCV clearance by direct-acting antiviral treatment not only regressed liver fibrosis but may have also restrained the progression of PVA in a patient with cirrhosis type C and PVA.

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Teaching point: Anticoagulation is advised in thrombosed portal vein aneurysm (PVA) without portal hypertension.

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Extrahepatic portal vein aneurysm (PVA) is a rare condition in which the extrahepatic portal vein is partially dilated into a sac-like or spindle-like shape. Usually, patients are followed, but surgery is considered in cases of rupture, thrombus, or enlargement. We report a case of thrombus formation in an extrahepatic portal vein aneurysm following trauma that resulted in regression of the aneurysm and extrahepatic portal vein occlusion. Immediately after the trauma, ultrasonography showed moderately hyperechoic structures and comet signs along the vessel wall of the aneurysm and turbulent blood flow in the aneurysm, like in a whirlpool. There were floating point-like echogenic features, which were presumed to be microthrombi. In other words, the trauma might have triggered Virchow's triad: changes in the vessel wall, changes in blood properties, and blood stagnation. This is a valuable case in which ultrasonography imaging revealed interesting changes during the thrombus formation process inside an extrahepatic portal vein aneurysm. The aneurysm's size was reduced by thrombus-induced organization, but the main trunk of the portal vein became deficient in blood flow, resulting in extrahepatic portal vein occlusion. This case is suggestive of the mechanism of extrahepatic portal vein occlusion.

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Objective To summarize the diagnosis and treatment experience of portal vein aneurysm after liver transplantation. Methods Clinical data of two recipients with portal vein aneurysm after liver transplantation were retrospectively analyzed. Clinical features, diagnosis, treatment and prognosis were summarized based on literature review. Results Both two cases were diagnosed with intrahepatic portal vein aneurysm complicated with portal vein thrombosis and portal hypertension after liver transplantation. Case 1 was given with targeted conservative treatment and he refused to undergo liver retransplantation. Physical condition was worsened after discharge, and the patient eventually died from liver graft failure, kidney failure, lung infection, and septic shock. Case 2 received high-dose glucocorticoid pulse therapy, whereas liver function was not improved, and the patient was recovered successfully after secondary liver transplantation. Conclusions Long-term complication of portal vein aneurysm (especially intrahepatic type) after liver transplantation probably indicates poor prognosis. Correct understanding, intimate follow-up and active treatment should be conducted. Liver retransplantation may be a potential treatment regimen.

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Portal vein aneurysm (PVA) is a rare vascular entity. Here, we describe cases of 2 separate patients who presented with congenital and acquired causes of PVA respectively. The first patient presented with vague abdominal pain and was incidentally diagnosed with PVA, whereas the cause in the second patient was iatrogenic. With a limited number of cases published to date, there is little data on the natural history of the disease. Herein, we will discuss the radiological findings aiding us in reaching our diagnosis and also the probable mimickers of the disease, with a brief overview of its possible causes, complications, and the currently available management options.

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Portal vein aneurysm (PVA) is rarely encountered, and published papers describing this etiology in adults and children typically include only case reports or small case series. We present a clinical case of PVA in a child associated with severe complications, including diffuse thrombosis of the portal venous system. A 10-year-old boy presented with abdominal pain and vomiting, resulting in an initial diagnosis of pancreatic head tumor based on suspicious images on abdominal grayscale ultrasound. Contrast-enhanced computed tomography confirmed a diagnosis of occlusive PVA thrombosis (36 × 37 × 95 mm). Lacking drastic symptoms, the patient was treated with conservative anticoagulant therapy. On follow-up, the thrombosis appeared to shrink gradually and disappeared at 6 months based on Doppler ultrasound imaging. The PVA was reduced in size, and hepatopetal flow was restored. Surgeons and radiologists should be aware of this rare entity to ensure that a precise diagnosis can be established and to provide suitable treatment.

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Portal vein aneurysm (PVA) is a rare entity that can lead to hemorrhage or thrombosis. Although there is no standard treatment, most cases can be managed conservatively; intervention is reserved for symptomatic or enlarging aneurysms. For patients who are not surgical candidates due to cirrhosis and portal hypertension, endovascular creation of a trans-jugular intrahepatic porto-systemic shunt (TIPS) is an option to reduce portal venous pressure. This report describes a case of an enlarging PVA successfully treated with TIPS in a patient with cryptogenic cirrhosis.

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BACKGROUND: Portal vein aneurysm (PVA) is an uncommon vascular dilatation, showing no clear trend in sex or age predominance. Due to the low number of published cases and the lack of management guidelines, treatment of this condition remains a clinical challenge. CASE SUMMARY: We present three cases of asymptomatic PVA; the first and second involve an extrahepatic manifestation, of 48 mm and 42.3 mm diameter respectively, and the third involves an intrahepatic PVA of 27 mm. All were diagnosed incidentally during routine check-up, upon ultrasonography scan. Since all patients were asymptomatic, a conservative treatment strategy was chosen. Follow-up imaging demonstrated no progression in the aneurysm dimension for any case. CONCLUSION: As PVA remains asymptomatic in many cases, recognition of its imaging features is key to favourable outcomes.

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Portal vein aneurysms are rare pathologic entities. A 3.7-cm portal vein aneurysm was incidentally discovered in an 80-year-old male patient on imaging for acute abdominal pain secondary to an incarcerated diaphragmatic hernia. The aneurysm was resected, and primary repair of the portal vein was performed during a second-look operation after repair of the incarcerated hernia. Operative intervention was chosen for this patient because of the aneurysm's size and the additional indication for abdominal exploration.

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BACKGROUND: Congenital portal vein aneurysm is a rare vascular anomaly with poorly understood natural history. Whereas asymptomatic aneurysms are often managed conservatively, surgery has been used in symptomatic cases complicated by thrombosis or rupture. Surgical experience in management of portal aneurysms is restricted to case studies with limited comparative data and inconsistent reporting of outcomes. A hybrid open and endovascular approach has rarely been described in the literature. METHODS: We present a case of an extrahepatic portal aneurysm which demonstrated changes on surveillance imaging concerning for early asymptomatic thrombosis. Acute thrombus was identified at the time of open aneurysm repair. We review the limited literature regarding management of portal vein aneurysms in non-cirrhotic patients. RESULTS: Our case was complicated by intrahepatic thrombo-embolism, which necessitated hybrid thrombectomy and anticoagulant therapy. The patient remains asymptomatic at three-year follow-up with no recurrent aneurysm or thrombosis on surveillance Doppler and CT imaging. CONCLUSIONS: Altered hemodynamic appearances on Doppler ultrasound and contrast-enhanced CT may warn of impending thrombosis in portal vein aneurysms. Hybrid open and endovascular surgical repair ensures vessel patency and a durable surgical result.

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Portal vein aneurysm (PVA) with portal vein thrombosis (PVT) is an exceedingly rare vascular phenomenon with a limited number of reported cases in the medical literature. We describe a case of a 25-year-old man found to have a congenital PVA with PVT initially believed to be a pancreatic mass. While there remains some incongruity amongst clinicians with such a limited number of reported cases, herein, we describe the general consensus of the diagnostic approach and management of this vascular malformation.

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Portal vein aneurysms are rare vascular findings for which there are no optimal treatment guidelines. The scarce knowledge about their etiology, natural history, and management mean that there are limited treatment options. Here, we describe the case of a 69-year-old woman who presented with a 35-mm hypoechoic area in the hilar region of the liver that was accidentally detected by ultrasonography. Color Doppler ultrasonography demonstrated a mass with internal flow contiguous with portal vein, which was confirmed to be a portal vein aneurysm by computed tomography. Given that she experienced no symptoms of impending rupture or thrombosed aneurysms, we adopted a conservative treatment. Follow-up imaging demonstrated slow progression of the aneurysm diameter, from 35 to 43 mm at 3 years, and to 48 mm at 6 years; subsequent imaging after 6 years did not show any change in the diameter from 48 mm. However, the portal vein aneurysm completely regressed with no complications at a follow-up of over 10 years. This case suggests that long-term observation with periodic imaging may be an acceptable therapeutic option for asymptomatic portal vein aneurysms that show no short-term improvement. This case report contributes to a better understanding of how to treat this rare disease.

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Intrahepatic arterioportal fistulas may be complicated by portal hypertension. An associated portal venous aneurysm (PVA) may impinge upon adjacent structures or rupture. We present a 65-year-old man with an intrahepatic Intrahepatic arterioportal fistula and 6.4 × 5.8 cm right portal vein aneurysm extending within 0.4 cm of the hepatic margin, associated with pain concerning for impending rupture. The PVA was refractory to transarterial embolization due to recruitment of arterial collaterals. Therefore, it was additionally excluded from the portal vein with a 12 mm × 9.5 cm venous stent graft. Although endovascular therapy thrombosed the aneurysm and improved symptoms, it was complicated by a type 2 endoleak into the PVA.

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OBJECTIVES: Portal vein aneurysm is an unusual vascular dilatation of the portal vein. The etiology, diagnosis and management are ill-defined. METHODS: A case of a portal vein aneurysm complicated with complete thrombosis is presented with a literature review providing an overview of the etiology, clinical presentation and management. RESULTS: Portal venous aneurysms represent approximately 3% of all venous aneurysms with a reported prevalence of 0.06%. The reported incidence is on the rise with increasing use of modern imaging techniques in clinical practice. Usually, portal vein aneurysms are incidental findings and patients are asymptomatic. They can be congenital or acquired and portal hypertension represents the most frequent cause of the acquired version. Various complications such as biliary tract compression, portal vein thrombosis, and rupture can occur. Treatment options are conservative management or surgery. Surgical treatment is currently reserved for symptomatic patients with severe abdominal pain, symptoms of pressure effect or with expanding aneurysms, and/or complications such as thrombosis or rupture. CONCLUSION: Conservative management seems the best option in the majority of patients. A multidisciplinary approach discussing the best option on a case-by-case base in light of their individual underlying risk and symptoms is advised.

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Portal vein aneurysms are rare vascular malformations with unclear etiologies and optimal treatment guidelines. Although Doppler ultrasonography is the most commonly used diagnostic tool, there is no gold standard imaging modality. Despite recommendations of surgical treatment for symptomatic aneurysms, there are limited options in the management of portal vein aneurysm-related complications in patients unfit for surgical intervention. We describe an 85-year-old man who presented with abdominal pain and low-grade fever with clinical signs consistent with cholangitis. Endoscopic retrograde cholangiopancreatography revealed a common hepatic duct stricture and concomitant intraductal ultrasonography identified adjacent aneurysmal portal vein dilatation. The final diagnosis of portal vein aneurysm was made using contrast computerized tomography scan. The patient was considered unsuitable for surgery due to his advanced age and multiple comorbidities. Instead, an endoscopic biliary plastic stent was inserted as a therapeutic alternative, which successfully achieved complete resolution of symptoms 3 days after the procedure. The patient was regularly followed at the outpatient clinic with repeated stent replacements every 3 to 4 months. After a follow-up of over 3.5 years, the patient remained symptom-free without signs of portal vein aneurysm compression. The result suggests that repeated stent replacements may be a therapeutic option for biliary compression by portal vein aneurysm in patients contraindicated for surgical intervention.

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BACKGROUND: Few cases of postoperative arterioportal fistula (APF) have been documented. APF after hepatectomy is a very rare surgery-related complication. CASE PRESENTATION: A 62-year-old man was diagnosed with hepatocellular carcinoma in segments 5 and 8, respectively. Anterior segmentectomy was performed as a curative surgery. Each branch of the hepatic artery, portal vein, and biliary duct for the anterior segment was ligated together as the Glissonean bundle. The patient was discharged on postoperative day 14. Three months later, dynamic magnetic resonance imaging showed an arterioportal fistula and portal vein aneurysm. Surprisingly, the patient did not have subtle symptoms. Although a perfect angiographic evaluation could not be ensured, we performed angiography with subsequent interventional radiology to avoid sudden rupture. Arteriography was immediately performed to create a portogram via the APF from the stump of the anterior hepatic artery, and portography clearly revealed hepatofugal portal vein flow. Portography also showed that the stump of the anterior portal vein had developed a 40-mm-diameter portal vein aneurysm. Selective embolization of the anterior hepatic artery was accomplished in the whole length of the stump of the anterior hepatic artery, and abnormal blood flow through the APF was drastically reduced. The portal vein aneurysm disappeared, and portal flow was normalized. Dynamic computed tomography after embolization clearly demonstrated perfect interruption of the APF. The patient maintained good health thereafter. CONCLUSIONS: Post-hepatectomy APFs are very rare, and some appear to be cryptogenic. Our thought-provoking case may help to provide a possible explanation of the causes of post-hepatectomy APF.

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We describe the incidental finding of an aneurysm of the left branch of the portal vein in a patient without liver pathology. The diagnosis was confirmed by Doppler ultrasound. LEARNING POINTS: Portal vein aneurysms are rare but have been described in patients with cirrhosis and portal hypertension.In most cases they are stable and do not progress.However, they do require follow-up in case serious complications develop.

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Background Portal vein aneurysms are rare dilations in the portal venous system, for which the etiology and pathophysiological consequences are poorly understood. Method We reviewed the existing literature as well as present a unique anecdotal case of a patient presenting with a very large portal vein aneurysm that was successfully managed conservatively and non-operatively without anticoagulation, with close follow-up and routine surveillance. Result The rising prevalence of abdominal imaging in clinical practice has increased rates of portal vein aneurysm detection. While asymptomatic aneurysms less than 3 cm can be clinically observed, surgical intervention may be necessary in large asymptomatic aneurysms (>3 cm) with or without thrombus, or small aneurysms with evidence of evolving mural thrombus formation on imaging. Conclusion Portal vein aneurysms present a diagnostic challenge for any surgeon, and the goal for surgical therapy is based on repairing the portal vein aneurysm, and if portal hypertension is present decompressing via surgically constructed shunts.

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Portal vein aneurysm (PVA) is a rare vascular dilatation of the portal vein. It is a rare vascular anomaly representing less than 3% of all visceral aneurysms and is not well understood. Usually, PVA are incidental findings, are asymptomatic, and clinical symptoms are proportionally related to size. Patients present with nonspecific epigastric pain or gastrointestinal bleeding with underlying portal hypertension. PVA may be associated with various complications such as biliary tract compression, portal vein thrombosis/rupture, duodenal compression, gastrointestinal bleeding, and inferior vena cava obstruction. Differential diagnoses of portal vein aneurysms are solid, cystic, and hypervascular abdominal masses, and it is important that the radiologists be aware of their multi-modality appearance; hence, the aim of this article was to provide an overview of the available literature to better simplify various aspects of this rare entity and diagnostic appearance on different modality with available treatment options. In our case, a 55-year-old male patient came to the gastroenterology OPD for further management of pancreatitis with portal hypertension and biliary obstruction with plastic stents in CBD and PD for the same. In this article, we have reported a case of largest intrahepatic portal vein aneurysm and its management by endovascular technique. As per our knowledge, this is the largest intrahepatic portal vein aneurysm and first case where the endovascular technique was used for the treatment of the same.