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Computed tomography angiography (CTA) was performed under general anaesthesia on a 7‐month‐old toy poodle that was referred with the chief complaints of salivation and neurological symptoms. The CTA revealed a rare form of posthepatic portosystemic shunt (PSS) via the suspected persistent left umbilical vein communicating with the internal thoracic vein in addition to an azygos continuation of the caudal vena cava (CVC). The patient underwent surgery for partial ligation of PSS on Day 4 after the initial examination. On Day 71, after the initial examination, a second surgery was performed for complete ligation. Approximately 10 years have passed since the patient's second surgery, and he is still healthy, and generally in good condition. Although the morphology of the shunt in this case was unusual and was accompanied by an azygos continuation of the CVC, a favourable course of treatment was obtained by ligating the shunt vessel. This case report suggests that CTA can reveal the complex morphological characteristics like our case. Surgical treatment in this case resulted in favourable progress, similar to that in dogs with commonly observed extrahepatic PSS. [ABSTRACT FROM AUTHOR]

A 3‐year‐old crossbreed dog (case 1) and a 3‐month‐old German Shorthaired Pointer (case 2) were presented for acute signs of encephalopathy. A portosystemic shunt (PSS) was suspected based on clinical context and laboratory exam results and was confirmed on computed tomography (CT) angiography in both cases. A left‐sided azygos (case 1) and right‐sided azygos (case 2) continuation of an interrupted caudal vena cava (CVC) and a situs ambiguous (SA) were also observed and considered as incidental findings. Both dogs underwent PSS surgical correction. Postsurgical follow‐up imaging procedures suggested concomitant primary hypoplasia of the portal vein (PHPV) in both cases. [ABSTRACT FROM AUTHOR]

Background: A congenital portosystemic shunt (CPSS) is defined as abnormal vascular communications between the portal vein and the systemic vein. Encephalopathy, hepatopulmonary syndrome, and portopulmonary hypertension are manifestations in patients with CPSS. Hyperinsulinemic hypoglycemia is also one of the manifestations of CPSS. Hyperinsulinemic hypoglycemia secondary to CPSS is caused by a lack of hepatic first‐pass elimination of insulin, which is secreted from pancreatic beta cells. Case Presentation: A 7‐month‐old boy had hypergalactosemia detected by newborn mass screening. Enhanced abdominal computed tomography showed the absence of the portal vein trunk and extrahepatic portosystemic communication between the superior mesenteric vein and the inferior vena cava. He had suffered from uncontrollable hyperinsulinemic hypoglycemia under protein and lactose restriction. We performed living donor liver transplantation (LDLT) using a left lateral segment graft from his father. The postoperative course was uneventful and the hypoglycemic attacks disappeared. Conclusion: We believe that uncontrolled hyperinsulinemic hypoglycemia secondary to CPSS is an indication of LDLT. [ABSTRACT FROM AUTHOR]

Canine congenital extrahepatic portosystemic shunt (EHPSS) morphologies have not been fully elucidated. The goal of this retrospective, multi‐institutional study was to use CT angiography to create an anatomical‐based nomenclature system for canine congenital EHPSS. These shunt morphologies were then evaluated to identify any significant association with patient age, sex, breed, weight, or subjective portal perfusion score. Data collected respectively from the SVSTS and VIRIES list‐serves included patient DOB, sex, breed, weight, CT date, and reported diagnosis. A single author (C.W.) viewed all CT scans and classified shunts based on the shunt portal vessel(s) of origin, the shunt systemic vessel(s) of insertion, and any substantial portal vessels contributing to the shunt. Additionally, hepatic portal perfusion was subjectively scored between one (poor/none) and five (good/normal) based on the caliber of the intrahepatic portal veins. A total of 1182 CT scans were submitted from 13 different institutions. Due to exclusion criteria, 100 (8.5%) were removed, leaving 1082 CT scans to be included. Forty‐five different EHPSS anatomies were identified with five classifications accounting for 85% of all shunts (left gastric‐phrenic [27%], left gastric‐azygos [19%], left gastric‐caval [15%], aberrant left gastric‐caval with right gastric vein [12%], and aberrant left gastric‐caval with right gastric vein and short gastric vein [11%]). Shunt origin involved the left gastric vein in 95% of the described classifications. Significant differences were identified among the five most common shunt types with respect to age at the time of the CT scan (P <.001), sex (P =.009), breed (P <.001), weight (P <.001), and subjective portal perfusion score (P <.001). An anatomical classification system for canine EHPSS may enable improved understanding, treatment comparisons, and outcome prediction for these patients. [ABSTRACT FROM AUTHOR]

A significant fraction of the popular inbred C57Bl/6J mice show structural and biochemical features of the congenital portosystemic shunt (PSS). How this hepatic abnormality affects physiological and behavioural parameters has not been explored in detail. Here, we confirmed the frequent occurrence of the PSS in C57Bl/6J mice by three different methods. We screened a cohort of 119 C57Bl/6J mice for total bile acids (TBA) in plasma, identified 11 animals (9.2%) with high TBA (>11 µm; 171.1 ± 76.8 µm), and confirmed PSS presence in that subset by magnetic resonance angiography and 1H‐magnetic resonance spectroscopy of brain metabolites in the hippocampal area. In addition to the high glutamine and low myo‐inositol levels, we detected lower levels of several neurotransmitters and metabolites in the hippocampus, higher brain weight and volume, as well as enhanced brain glucose utilisation in the PSS mice. We also observed differences in peripheral organ weights, haematological cell counts and clinical chemistry parameters in C57Bl/6J mice with and without PSS. Animals with PSS were slightly hyperlocomotive, had better balance on the rotarod, showed altered gait properties, and displayed attenuated fear memory in the fear conditioning test. Furthermore, we revealed a significant alteration of the pharmacokinetic profile of diazepam in C57Bl/6J mice with PSS. Our data support previous reports of hepatic disturbances and demonstrate an altered neurobiological phenotype in C57Bl/6J mice with PSS. Such congenital differences between inbred C57Bl/6J littermates may significantly distort experimental outcomes of pharmacological, behavioural and genetic studies. Key points: A significant proportion of C57Bl/6J mice, an inbred strain popular in preclinical research, have congenital portosystemic shunts (PSS) that allow venous blood to enter systemic circulation bypassing the liver.In this study, we extended existing knowledge of PSS consequences, particularly with respect to the effects on brain structure and function.We demonstrated that C57Bl/6J mice with PSS differ from their normal counterparts in brain size and contents of several neuroactive substances, as well as in peripheral organ weights, rate of glucose utilisation, blood cell counts and blood clinical chemistry parameters.C57Bl/6J mice with PSS showed altered locomotor behaviour, performed worse in a memory test and had abnormal blood pharmacokinetics of a benzodiazepine drug after a single administration.PSS presence may significantly complicate the interpretation of experiments in C57Bl/6J mice; therefore, we propose that before their use in biomedical studies, these mice should be screened with a simple blood test. [ABSTRACT FROM AUTHOR]

Acute variceal bleeding in cirrhosis represents a critical clinical event that significantly impacts patient prognosis, with mortality rates increasing further after a second episode. This underscores the need for immediate intervention and optimal prophylaxis. The creation of a transjugular intrahepatic portosystemic shunt (TIPS) has been proven to be highly effective for managing esophageal variceal bleeding. However, the use of TIPS for managing cardiofundal gastric varices and ectopic varices remains debated due to their unique vascular anatomy and the limited data available. These varices, although less prevalent than esophageal varices, are complex and heterogeneous vascular shunts between the splanchnic venous system and the systemic veins. Indeed, while endoscopic therapy with tissue adhesives is widely endorsed for achieving hemostasis in active hemorrhage, there is no consensus regarding the optimal approach for secondary prophylaxis. Recent research emphasizes the efficacy of endovascular techniques over endoscopic treatments, such as TIPS and endovascular variceal embolization techniques. This review examines the use of TIPS in managing acute variceal bleeding in patients with cirrhosis, focusing specifically on cardiofundal gastric varices and ectopic varices, discussing optimal patient care based on the latest evidence, aiming to improve outcomes for this challenging subset of patients. [ABSTRACT FROM AUTHOR]

The evolution of splenomegaly in patients with liver cirrhosis remains largely unknown. In this study, we followed the changes in splenic volume and established the natural course of splenomegaly. We developed an electronic circuit that simulated splenoportal circulation and identified the underlying hemodynamic mechanisms. This retrospective observational study included 93 patients with cirrhosis. Splenic volumes were measured in imaging studies at 6-month intervals and normalized by the ratio of each patient's maximum volume during follow-up (%Vmax). An electronic simulation model was constructed using software and realized on a breadboard. Overall, the %Vmax increased from 0.77 ​± ​0.21 to a maximum of 1.00 ​± ​0.00 (p ​< ​0.001) during a median follow-up of 23 (3–162) months and then decreased to 0.84 ​± ​0.18 (p ​< ​0.001) during the next 9 (3–132) months. No interventional radiology procedure was performed to improve hepatic fibrosis and portal hypertension. The evolution of %Vmax showed single-peaked symmetry. An electronic simulation model showed that the upslope of the evolution curve was dependent on the increased intrahepatic vascular resistance and portal hypertension, whereas the downslope was dependent on the decreased portosystemic shunt (PSS) resistance. Splenomegaly in cirrhotic patients aggravated over a period of 23 months and then regressed spontaneously to its initial volume. Electronic simulation of splenoportal circulation showed that splenic enlargement was due to the advancement of liver cirrhosis and portal hypertension, whereas its regression was due to the development of a PSS. [ABSTRACT FROM AUTHOR]

Multiple primary cancers (MPC) refer to the presence of more than one type of cancer with different histological features and sites in the same individual, and it is relatively rare in clinical practice. This article reports a case of decompensated cirrhosis with MPC and discusses the diagnosis, treatment, and clinical implications of this patient with decompensated cirrhosis and MPC. [ABSTRACT FROM AUTHOR]

Although congenital portosystemic shunts (CPSSs) are increasingly being recognized, the optimal treatment strategies and natural prognosis remain unclear, as individual CPSSs show different phenotypes. The medical records of 122 patients who were diagnosed with CPSSs at 15 participating hospitals in Japan between 2000 and 2019 were collected for a retrospective analysis based on the state of portal vein (PV) visualization on imaging. Among the 122 patients, 75 (61.5%) showed PV on imaging. The median age at the diagnosis was 5 months. The main complications related to CPSS were hyperammonemia (85.2%), liver masses (25.4%), hepatopulmonary shunts (13.9%), and pulmonary hypertension (11.5%). The prevalence of complications was significantly higher in patients without PV visualization than in those with PV visualization (P < 0.001). Overall, 91 patients (74.6%) received treatment, including shunt closure by surgery or interventional radiology (n = 82) and liver transplantation (LT) or liver resection (n = 9). Over the past 20 years, there has been a decrease in the number of patients undergoing LT. Although most patients showed improvement or reduced progression of symptoms, liver masses and pulmonary hypertension were less likely to improve after shunt closure. Complications related to shunt closure were more likely to occur in patients without PV visualization (P = 0.001). In 25 patients (20.5%) without treatment, those without PV visualization were significantly more likely to develop complications related to CPSS than those with PV visualization (P = 0.011). Patients without PV visualization develop CPSS-related complications and, early treatment using prophylactic approaches should be considered, even if they are asymptomatic. Level III. • What is currently known about this topic? A congenital portosystemic shunt is a rare disease with diverse manifestations and is divided into intra- and extrahepatic shuts. However, it has been mainly mentioned in case reports or small series with short-term follow-up. • What new information is contained in this article? This study focuses on the impact of portal flow on the prognosis of children with congenital portosystemic shunts. Patients without delineation of the portal vein system tend to develop more shunt-related symptoms and are more prone to portal hypertension-related complications after shunt closure. [ABSTRACT FROM AUTHOR]

We describe the endovascular embolization of a 65-year-old man with chronic hepatic encephalopathy. A contrast-enhanced computed tomography demonstrated a splenorenal shunt and a recanalized paraumbilical vein as a continuous portal shunt connecting the left branch of the portal vein and the right common femoral vein. A 2-session embolization was performed for the splenorenal shunt. First, the transvenous approach was used for coil embolization of the splenorenal shunt. It was difficult to advance the catheter system to the embolization site, and it was unstable during coil placement. Second, the paraumbilical venous approach was used to place additional coils. The catheter system had good maneuverability and easily reached the embolization site. Additionally, the stable system allowed for densely packed additional coil implantations. This report demonstrated the paraumbilical venous approach's effectiveness in catheter maneuverability and system stability during coil embolization.

Background and aims: Performing a Transjugular intrahepatic portal system shunt (TIPS) in patients with portal vein cavernous transformation (CTPV) poses significant challenges. As an alternative, transjugular extrahepatic portal vein shunt (TEPS) may offer a potential solution for these patients. Nonetheless, the effectiveness and safety of TEPS remain uncertain. This case series study aimed to evaluate the efficacy and safety of TEPS in treating patients with CTPV portal hypertension complications. Methods: The study encompassed a cohort of 22 patients diagnosed with CTPV who underwent TEPS procedures. Of these, 13 patients manifested recurrent hemorrhagic episodes subsequent to conventional therapies, 8 patients grappled with recurrent or refractory ascites, and 1 patient experienced acute bleeding but refused endoscopic treatment. Comprehensive postoperative monitoring was conducted for all patients to rigorously evaluate both the technical and clinical efficacy of the intervention, as well as long-term outcomes. Results: The overall procedural success rate among the 22 patients was 95.5% (21/22).During the TEPS procedure, nine patients were guided by percutaneous splenic access, three patients were guided by percutaneous hepatic access, five patients were guided by transmesenteric vein access from the abdomen, and two patients were guided by catheter marking from the hepatic artery. Additionally, guidance for three patients was facilitated by pre-existing TIPS stents. The postoperative portal pressure gradient following TEPS demonstrated a statistically significant decrease compared to preoperative values (24.95 ± 3.19 mmHg vs. 11.48 ± 1.74 mmHg, p < 0.01).Although three patients encountered perioperative complications, their conditions ameliorated following symptomatic treatment, and no procedure-related fatalities occurred. During a median follow-up period of 14 months, spanning a range of 5 to 39 months, we observed four fatalities. Specifically, one death was attributed to hepatocellular carcinoma, while the remaining three were ascribed to chronic liver failure. During the follow-up period, no instances of shunt dysfunction were observed. Conclusions: Precision-guided TEPS appears to be a safe and efficacious intervention for the management of CTPV. [ABSTRACT FROM AUTHOR]

Background: The ductus venosus (DV) is a pivotal component of fetal circulation. Absent DV (ADV) is associated with structural defects, portal vein (PV) anomalies, and chromosomal anomalies. This observational study aims to investigate the impact of ADV on fetal circulation and postnatal outcomes. Materials and Methods: This observational study was conducted from August 2016 to January 2020 at a fetal and pediatric cardiac center. The DV was evaluated as part of routine fetal echocardiography. Cases of ADV were identified. Blood flow and exit points of the umbilical vein were studied. Cardiothoracic ratio, hydrops, and PV were assessed during the initial and follow-up scans. The postnatal evaluation included an ultrasound abdomen and computed tomography with triple-phase imaging to assess portosystemic shunts (PSSs). Serum ammonia levels were monitored. Results: Twelve patients with ADV were identified. The median maternal age and median gestational age were 27.5 years and 22 weeks, respectively. Four patients had intrahepatic drainage, while eight had extrahepatic drainage. All patients (100%) exhibited cardiomegaly, but none developed hydrops. Four patients had persistent PSS postnatally. All four patients with PSS had asymptomatic hyperammonemia. Two patients underwent transcatheter closure of PSS. The intrahepatic variant showed good PV anatomy with no evidence of PSS. Conclusions: DV evaluation should be performed during fetal echocardiography. ADV can lead to cardiomegaly and dilation of the right atrium and ventricle. PSS can be a potential sequela of the extrahepatic variant of ADV. [ABSTRACT FROM AUTHOR]

The prevalence of anatomical‐based subtypes of feline congenital extrahepatic portosystemic shunts (EHPSS) has not been completely elucidated. The goal of this study was to use CT angiography to create an anatomical‐based nomenclature system for feline congenital EHPSS. Additionally, subjective portal perfusion scores were generated to determine if intrinsic portal vein development was associated with different shunt conformations or patient age at the time of CT. The SVSTS and VIRIES list services were used to recruit cases. Data collected included patient DOB, gender, breed, weight, CT date, and reported diagnosis. Shunts were classified based upon (1) the shunt portal vessel(s) of origin, (2) the shunt systemic vessel(s) of insertion, and (3) any substantial portal vessels contributing to the shunt. Additionally, hepatic portal perfusion was subjectively scored between 1 (poor/none) and 5 (good/normal) based on the caliber of the intrahepatic PVs. A total of 264 CT scans were submitted from 29 institutions. Due to exclusion criteria, 33 (13%) were removed, leaving 231 CT scans to be included. Twenty‐five different EHPSS anatomies were identified with five classifications accounting for 78% of all shunts (LGP [53%], LGC‐post [11%], LCG [7%], LGC‐pre [4%], and PC [4%]). Shunt origin involved the left gastric vein in 75% of the described classifications. Significant differences were identified among the five most common shunt types with respect to age at the time of CT scan (P =.002), breed (P <.001), and subjective portal perfusion score (P <.001). This refined anatomical classification system for feline EHPSS may enable improved understanding, treatment comparisons, and outcome prediction for cats with these anomalies. [ABSTRACT FROM AUTHOR]

ABSTRACT Computed tomography angiography (CTA) was performed under general anaesthesia on a 7‐month‐old toy poodle that was referred with the chief complaints of salivation and neurological symptoms. The CTA revealed a rare form of posthepatic portosystemic shunt (PSS) via the suspected persistent left umbilical vein communicating with the internal thoracic vein in addition to an azygos continuation of the caudal vena cava (CVC). The patient underwent surgery for partial ligation of PSS on Day 4 after the initial examination. On Day 71, after the initial examination, a second surgery was performed for complete ligation. Approximately 10 years have passed since the patient's second surgery, and he is still healthy, and generally in good condition. Although the morphology of the shunt in this case was unusual and was accompanied by an azygos continuation of the CVC, a favourable course of treatment was obtained by ligating the shunt vessel. This case report suggests that CTA can reveal the complex morphological characteristics like our case. Surgical treatment in this case resulted in favourable progress, similar to that in dogs with commonly observed extrahepatic PSS.

Hepatic myelopathy (HM) is a rare complication of end-stage chronic liver disease, primarily presenting as symmetrical lower limb weakness that progresses to spastic paralysis without sensory or sphincter dysfunction. We report a case of decompensated cirrhosis associated with hepatitis B virus and HM. The patient showed significant recovery after liver transplantation (LT) and comprehensive rehabilitation training. We summarize the patient’s clinical characteristics post-diagnosis and the assessment outcomes following integrated treatment.

Hepatic encephalopathy in dogs is a metabolic disorder of the central nervous system that occurs secondary to liver dysfunctions regardless of whether they have acquired or congenital causes. In the present paper, a 3-monthold Bichon canine patient, with a history of seizures secondary to a portosystemic shunt, is presented. The electroencephalographic (EEG) trace was characterized by the presence of bilateral symmetrical, triphasic waves, mimicking nonconvulsive status epilepticus. [ABSTRACT FROM AUTHOR]

Introduction: Laparoscopic surgery is used for canine congenital extrahepatic portosystemic shunts (CEHPSS). However, outcomes of laparoscopic surgery involving simultaneous portal vein angiography and portal pressure measurement to attenuate or completely occlude the shunt vessel in canines remain unclear. This study aimed to evaluate outcomes and complications of laparoscopic portosystemic shunt occlusion (LAPSSO) for CEHPSS. Methods: Between June 2014 and March 2021, data on dogs undergoing cellophane banding (CB) and complete occlusion of laparoscopically treated congenital extrahepatic port shunts were collected from hospital records. Cases in which complete occlusion was laparoscopically performed, or a CB was used for gradual occlusion were included. A total of 36 dogs (14 males; median age 32.5 months [range, 5--99] with median body weight, 4.2 kg [range, 1.5--7.9]) that underwent LAPSSO for CEHPSS were included. All the dogs underwent computed tomographic angiography (CTA), and data on blood and radiological examinations were collected. Shunt vessel morphology was categorized using CTA findings. Portal pressure measurements and portal angiography were performed by accessing mesenteric and splenic veins in 30 and 6 cases, respectively. Results: The most common shunt types were spleno-phrenic shunts 16/36 (44.4%), followed by spleno-azygos 9/36 (25.0%), spleno-caval 4/36 (11.1%), right gastric-caval 6/36 (16.6%), and right gastric-caval with caudal loop shunts 1/36 (2.7%). The median portal pressure after complete occlusion was 11.5 mmHg (range, 4--16); portal pressures in the two dogs undergoing CB attenuation were 22 and 24 mmHg. The median operating time in the dogs with right (n = 25) and left (n = 11) recumbent positioning was 55 min (range, 28--120) and 54 min (range, 28--88), respectively. One dog had pneumothorax due to injury to the diaphragm. Another dog developed postoperative hypernatremia and succumbed 5 h post-procedure. Nevertheless, no other dogs exhibited signs of portal hypertension within 72 h. Blood tests and abdominal ultrasounds performed 1--2 months postoperatively revealed no residual shunts. Discussion: LAPSSO, coupled with portal pressure measurement and portal angiography, was shown as safe and effective approach that facilitated successful occlusion of CEHPSS. Further large-scale prospective studies and analyses of perioperative complications are needed. [ABSTRACT FROM AUTHOR]

Summary: Hepatocellular adenomas (HCAs) are rare benign liver tumours. Predisposing factors and complication rates appear to differ among children and adults. In the present study, we aimed to systematically characterise paediatric HCAs and determine their course, complications, and management. Medical history, clinical symptoms, imaging, histopathology, and genetics of children with HCAs were collected through a systematic and comprehensive review of the published literature. A total of 316 children with HCAs were included in the present study. HCAs were diagnosed primarily in girls (59.3%) and at a mean age of 11.5 (range 0-17.7) years. The majority (83.6%) of HCAs occurred in children with predisposing diseases, of which glycogen storage disease was the most common, followed by portosystemic shunts and MODY3 (maturity-onset diabetes of the young type 3). Each of these diseases leads to a well-defined HCA molecular pattern. A significant number of HCAs either bled (24.7%) or transformed (14.8%) over time. HCA transformation was significantly more frequent in children with portosystemic shunts and in β-catenin-mutated HCAs, while haemorrhages were more frequent in children exposed to hormones and those with larger lesions. Management was primarily guided by any predisposing conditions and the number of lesions. Therefore, vascular shunts were closed when possible, while complicated lesions were resected. Liver transplantation has made it possible to treat adenomatosis, as well as any underlying diseases. Progress in understanding genetic and/or malformative contributions, which appear to be significant in paediatric HCAs, have provided insights into tumour pathogenesis and will further guide patient surveillance and management.

Background & Aims: Hepatocellular carcinoma (HCC) is a male-dominant disease, but targeted sex hormone therapies have not been successful. Bile acids are a potential liver carcinogen and are biomolecules with hormone-like effects. A few studies highlight their potential sex dimorphism in physiology and disease. We hypothesized that bile acids could be a potential molecular signature that explains sex disparity in HCC. Methods & Results: We used the farnesoid X receptor knockout (FxrKO) mouse model to study bile acid-dependent HCC. Temporal tracking of circulating bile acids determined more than 80% of FxrKO females developed spontaneous cholemia (ie, serum total bile acids ≥40 μmol/L) as early as 8 weeks old. Opposingly, FxrKO males were highly resistant to cholemia, with ∼23% incidence even when 26 weeks old. However, FxrKO males demonstrated higher levels of deoxycholate than females. Compared with males, FxrKO females had more severe cholestatic liver injury and further aberrancies in bile acid metabolism. Yet, FxrKO females expressed more detoxification transcripts and had greater renal excretion of bile acids. Intervention with CYP7A1 (rate limiting enzyme for bile acid biosynthesis) deficiency or taurine supplementation either completely or partially normalized bile acid levels and liver injury in FxrKO females. Despite higher cholemia prevalence in FxrKO females, their tumor burden was less compared with FxrKO males. An exception to this sex-dimorphic pattern was found in a subset of male and female FxrKO mice born with congenital cholemia due to portosystemic shunt, where both sexes had comparable robust HCC. Conclusions: Our study highlights bile acids as sex-dimorphic metabolites in HCC except in the case of portosystemic shunt.

Hepatic encephalopathy is uncommon in the absence of cirrhosis. We report a 71-year-old woman who presented with altered mental status in the setting of hyperammonemia for the second time in 6 months. Magnetic resonance imaging of the abdomen revealed an uncommon portosystemic shunt involving an enlarged posterior branch of the right portal vein and an accessory right hepatic vein, with no features of cirrhosis. Appropriate management of these patients with ammonia-lowering therapy can reduce repeat episodes and improve quality of life. This case demonstrates the importance of diagnosing non-cirrhotic hepatic encephalopathy in patients with altered mental status. [ABSTRACT FROM AUTHOR]

Congenital portosystemic shunts may result in the development of hepatopulmonary syndrome, typically presenting with progressive hypoxemia in later childhood. We describe a case of a 5-month-old male with heterotaxy with polysplenia presenting with new onset hypoxemia. Subsequent evaluation identified an extrahepatic portosystemic shunt arising from the confluence of the main portal and superior mesenteric veins draining into the left renal vein. To treat his hypoxemia and prevent future complications of shunting, the patient underwent a successful single-stage endovascular closure. [ABSTRACT FROM AUTHOR]

Purpose: Limited data exist regarding outcome and morbidity associated with portosystemic shunts in the pediatric transplant population. Our study assesses the outcomes of pediatric patients who underwent a portosystemic shunt procedure, both with and without liver transplantation (LT). Methods: This study retrospectively reviewed the medical records of pediatric patients aged 0-19 years who underwent shunt placement between 2003 and 2017 at a tertiary care center. The analysis included cases of shunt placement with or without LT. Results: A total of 13 pediatric patients were included in the study with median age of 8.8 years. Among the cases, 11 out of 13 (84.6%) underwent splenorenal shunt, 1 (7.7%) underwent a mesocaval shunt, and another 1 (7.7%) underwent a Modified Rex (mesoportal) shunt. Additionally, 5 out of 13 (38.5%) patients had LT, with 4 out of 5 (80.0%) receiving the transplant before shunt placement, and 1 out of 5 (20.0%) receiving it after shunt placement. Gastrointestinal bleeding resulting from portal hypertension was the indication in all cases. A total of 10 complications were reported in 5 patients; the most common complication was anemia in 3 (23.1%) patients. At the most recent follow-up visit, the shunts were functional without encephalopathy, and no deaths were reported. Conclusion: Shunt placement plays a crucial role in the management of patients with portal hypertension. Our study demonstrates favorable long-term outcomes in pediatric patients who underwent shunt placement. Long term shunt outcomes were similar and unremarkable in patients with LT and without LT. [ABSTRACT FROM AUTHOR]

Liposarcomas are malignant tumors of the adipose tissue that are locally invasive and have a high recurrence rate but low metastatic potential in dogs and cats. Portosystemic shunts (PSS) are abnormal blood vessels in which the portal system bypasses the liver and connects to the systemic vascular system. To date, there have been no reports of abdominal liposarcoma or PSS in meerkats. We aimed to report the imaging features of abdominal liposarcoma in a meerkat with a splenorenal shunt and detail the surgical procedure for liposarcoma removal, histopathologic findings, and follow-up care. A 3-year-old spayed female meerkat (Suricata suricatta) without clear clinical symptoms was brought to the animal hospital for a checkup. A mass was observed between the right lobe of the liver and the diaphragm using several imaging modalities. The mass appeared radiolucent on radiography, partially hyperechoic on ultrasonography, heterogeneously attenuated with a fat-like area on computed tomography (CT), and was histopathologically diagnosed as a liposarcoma. Additionally, a mildly radiopaque structure caudal to the left kidney was observed on radiography and as a tubular vessel on ultrasonography, and a splenorenal shunt originating from the splenic vein and terminating in the left renal vein was confirmed on CT. There were no remarkable findings during the follow-up 7 months after surgery. We describe the imaging features of a meerkat with an abdominal liposarcoma and a splenorenal shunt. In cases of abdominal heterogeneous attenuated masses with fat-like areas on CT in meerkats, liposarcoma should be included in the differential diagnosis. [ABSTRACT FROM AUTHOR]

Two Northern cheetahs (Acinonyx jubatus soemmeringii) were euthanased at the Zoological Society of London's Whipsnade Zoo due to old age and degenerative joint disease. Both animals were found to have mild to moderate fibrosis of the space of Disse (veno‐occlusive disease) and multiple congested, tortuous vessels running from the hepatic portal vein to the caudal vena cava (acquired portosystemic shunt). We hypothesise that the shunts result from portal hypertension caused by the veno‐occlusive disease, and that this helps relieve pressure on the sinusoidal endothelium, limiting progression of the disease. As acquired portosystemic shunt is a known sequel to portal hypertension, we believe that acquired portosystemic shunt may be more common in cheetahs with veno‐occlusive disease than is currently reported, and provide a practical protocol and gross images as diagnostic tools to aid in the postmortem diagnosis of this condition. [ABSTRACT FROM AUTHOR]

Purpose: To develop and assess machine learning (ML) models' ability to predict post-procedural hepatic encephalopathy (HE) following transjugular intrahepatic portosystemic shunt (TIPS) placement. Materials and Methods: In this retrospective study, 327 patients who underwent TIPS for hepatic cirrhosis between 2005 and 2019 were analyzed. Thirty features (8 clinical, 10 laboratory, 12 procedural) were collected, and HE development regardless of severity was recorded one month follow-up. Univariate statistical analysis was performed with numeric and categoric data, as appropriate. Feature selection is used with a sequential feature selection model with fivefold cross-validation (CV). Three ML models were developed using support vector machine (SVM), logistic regression (LR) and CatBoost, algorithms. Performances were evaluated with nested fivefold-CV technique. Results: Post-procedural HE was observed in 105 (32%) patients. Patients with variceal bleeding (p = 0.008) and high post-porto-systemic pressure gradient (p = 0.004) had a significantly increased likelihood of developing HE. Also, patients having only one indication of bleeding or ascites were significantly unlikely to develop HE as well as Budd-Chiari disease (p = 0.03). The feature selection algorithm selected 7 features. Accuracy ratios for the SVM, LR and CatBoost, models were 74%, 75%, and 73%, with area under the curve (AUC) values of 0.82, 0.83, and 0.83, respectively. Conclusion: ML models can aid identifying patients at risk of developing HE after TIPS placement, providing an additional tool for patient selection and management. [ABSTRACT FROM AUTHOR]

Background and aim: Our primary objective is to report the results of the ultrasound (US)-guided revision technique of transhepatic shunt in patients in whom intrahepatic portosystemic shunt was created by the percutaneous or conventional route. Our secondary objective is to investigate whether there is an association between the indication for a portosystemic shunt and the need for post-shunt revision. Methods: Data from 117 consecutive patients who had a transjugular intrahepatic portosystemic shunt placed percutaneously or conventionally were extracted from hospital electronic medical records and examined those who underwent revision within 11 years and those who did not. US-guided transhepatic shunt revision technique was evaluated in terms of technical success, complications, and patency. In addition, the relationship between etiology and the need for revision was also examined using the chi-square test in three groups. Results: Forty six point two percent of patients who underwent transjugular intrahepatic portosystemic shunt required one or more revisions within 11 years. While patency of the shunt could be established via the transjugular route in 83.3% of revision patients, it was necessary to use the transhepatic route in 16.7%. The technical success rate for the US-guided transhepatic shunt revision method was 100%, and the pressure gradient between the portal and hepatic venous systems decreased below 10 mmHg in all patients at the end of the procedure. Conclusion: US-guided transhepatic shunt revision is a safe and effective method where transjugular revision cannot be performed. In addition, the revision rate is significantly higher in patients who have undergone transjugular intrahepatic portosystemic shunt due to Budd-Chiari syndrome compared with other groups. [ABSTRACT FROM AUTHOR]

Abstract Background There is limited information regarding percutaneous transvenous coil embolization (PTCE) for single extrahepatic portosystemic shunt (PSS). This study aimed to describe the procedure and outcome of PTCE in dogs with a single extrahepatic PSS. Forty-two privately owned dogs were included in this study. All dogs were diagnosed with extrahepatic PSS by computed tomography (CT). Preoperative CT images were used to evaluate the diameter of the PSS for coil placement. A multipurpose balloon catheter was percutaneously inserted into the PSS via the jugular vein, and transvenous retrograde portography (TRP) and measurement of blood pressure in the PSS (pPSS) were performed during balloon inflation; one or more embolization coils were implanted via the catheter. Results In most cases, preoperative median fasting and postprandial serum total bile acid (TBA) concentrations were high (fasting, 86.5 μmol/L [ 3.7–250.0 μmol/L]; postprandial, 165.5 μmol/L [ 1.5–565.0 μmol/L]). CT revealed that 30 dogs had left gastrophrenic shunt; eight had left gastroazygos shunt; and one each had left gastrocaval, splenocaval, splenophrenic, and left colocaval shunt. TRP revealed that intrahepatic portal vascularity was clearly detectable in all dogs. The median values of pPSS before and during the balloon occlusion were 4.8 mmHg [2.0–13.0 mmHg] and 8.6 mmHg [5.0–18.0 mmHg], respectively. The median number and diameter of coils used were 2 coils [1 – 5 coils] and 8.0 mm [4.0 – 12.0 mm], respectively. The median times of irradiation and PTCE were 9 min [4–26 min] and 40 min [23–75 min], respectively. The median fasting and postprandial TBAs significantly decreased to 8.2 μmol/L [0.3–45.1 μmol/L, n = 38, p = 0.0028] and 19.8 μmol/L [0.3–106.7 μmol/L, n = 38, p = 0.0018], respectively, approximately 1 month after PTCE. The clinical success rate of PTCE without requirement for a second surgery was 95.2% (40/42 dogs). During revision surgery, one dog underwent surgical ligation and, in another dog, an ameroid constrictor was placed. Conclusions PTCE was clinically effective in treating single extrahepatic PSS in dogs. Preoperative CT and TRP prior to PTCE might be clinically valuable for choosing the size of embolization coils, deciding the appropriate location of coil implantation, and estimating the number of coils to be implanted. PTCE is a promising alternative to conventional surgical procedures for single extrahepatic PSS in dogs.

We report a case of portosystemic encephalopathy treated by retrograde transvenous obliteration (RTO) with an antecubital vein approach using a steerable triaxial system. A 77-year-old female was referred to our department complaining of dizziness and tremor. Laboratory data showed hyperammonemia. Contrast-enhanced CT and 3D-CT reconstruction images demonstrated an inferior mesenteric vein (IMV)-left common iliac vein shunt and a splenorenal shunt. The former was treated as a responsible shunt. The spleen volume was 212 mL, and the liver volume was 757 mL; giving a spleen/liver volume ratio of 0.3. Partial splenic artery embolization (PSE) was employed to control portal venous pressure. The hepatic venous pressure gradient (HVPG) changed from 13.2 to 9.6 mm Hg and the spleen/liver volume ratio improved from 0.3 to 0.2 by PSE. Two months after PSE, RTO with an antecubital vein approach using a steerable triaxial system was performed. HVPG changed to 12.5 mm Hg after RTO. Contrast-enhanced CT and 3D-CT reconstruction images 3 days after the procedure demonstrated the thrombus in the IMV-left common iliac vein shunt. We conclude that the antecubital vein approach using a steerable triaxial system is a feasible and minimally invasive technique in RTO for portosystemic shunts.

Portal vein thrombosis is a rare complication after laparoscopic sleeve gastrectomy, a widely performed bariatric surgery procedure. Occasionally, the development of portal vein thrombosis can progress to more severe conditions, including portal hypertension and cavernomatosis, thereby presenting a complex and challenging clinical scenario. The management of such complications often requires careful consideration; however, surgical intervention in the form of a splenorenal shunt is an exceptional indication. We present the case of a 33-year-old female patient who had previously undergone laparoscopic sleeve gastrectomy in 2014 and subsequently developed portal thrombosis, followed by cavernomatosis and associated complications of portal hypertension. A proximal splenorenal shunt procedure and splenectomy were successfully performed to manage portal hypertension. The presentation of this clinical case aims to contribute to the available evidence and knowledge surrounding this rare and challenging pathology. [ABSTRACT FROM AUTHOR]

Abstract Objective The objective of this study was to evaluate differences in outcomes in dogs treated for extrahepatic portosystemic shunts (EHPSS) by either complete suture ligation, partial suture ligation or medical management. Study design This wasa retrospective, single institutional study. Sample population Dogs (n = 152) with EHPSS treated with suture ligation (n = 62), surgery with no ligation (n = 2), or medical management (n = 88). Methods Medical records were reviewed for data on signalment, treatment variables, complications, and outcome. Kaplan–Meier plots were generated to assess survival across groups. Cox's proportional hazard models were used to assess the relationship between survival times and multiple predictor variables. For outcomes of interest, backwards, stepwise regression was performed (p < 0.05). Results Complete suture ligation was possible in 46/64 (71.9%) of dogs where surgical attenuation was attempted. One dog was euthanized following partial suture ligation due to suspected portal hypertension. Dogs with complete suture ligation of the EHPSS had a significantly longer median survival time (MST) compared to the medical management group (MST not reached vs. 1730 days [p < 0.001]). Complete resolution of clinical signs (without the need for further medical treatment or dietary changes) was achieved in 16/20 (80.0%) dogs with complete suture ligation and 4/10 (40.0%) dogs with partial suture ligation of their EHPSS. Conclusion Suture ligation (complete or partial) for the treatment of EHPSS, where clinically possible, yielded the best clinical outcome and increased longevity compared to medical management in this study. Clinical Significance While medical management for the treatment of EHPSS in dogs is a valid treatment option, better clinical outcomes are achieved with surgical intervention.

Background: There is limited information regarding percutaneous transvenous coil embolization (PTCE) for single extrahepatic portosystemic shunt (PSS). This study aimed to describe the procedure and outcome of PTCE in dogs with a single extrahepatic PSS. Forty-two privately owned dogs were included in this study. All dogs were diagnosed with extrahepatic PSS by computed tomography (CT). Preoperative CT images were used to evaluate the diameter of the PSS for coil placement. A multipurpose balloon catheter was percutaneously inserted into the PSS via the jugular vein, and transvenous retrograde portography (TRP) and measurement of blood pressure in the PSS (pPSS) were performed during balloon inflation; one or more embolization coils were implanted via the catheter. Results: In most cases, preoperative median fasting and postprandial serum total bile acid (TBA) concentrations were high (fasting, 86.5 μmol/L [ 3.7–250.0 μmol/L]; postprandial, 165.5 μmol/L [ 1.5–565.0 μmol/L]). CT revealed that 30 dogs had left gastrophrenic shunt; eight had left gastroazygos shunt; and one each had left gastrocaval, splenocaval, splenophrenic, and left colocaval shunt. TRP revealed that intrahepatic portal vascularity was clearly detectable in all dogs. The median values of pPSS before and during the balloon occlusion were 4.8 mmHg [2.0–13.0 mmHg] and 8.6 mmHg [5.0–18.0 mmHg], respectively. The median number and diameter of coils used were 2 coils [1 – 5 coils] and 8.0 mm [4.0 – 12.0 mm], respectively. The median times of irradiation and PTCE were 9 min [4–26 min] and 40 min [23–75 min], respectively. The median fasting and postprandial TBAs significantly decreased to 8.2 μmol/L [0.3–45.1 μmol/L, n = 38, p = 0.0028] and 19.8 μmol/L [0.3–106.7 μmol/L, n = 38, p = 0.0018], respectively, approximately 1 month after PTCE. The clinical success rate of PTCE without requirement for a second surgery was 95.2% (40/42 dogs). During revision surgery, one dog underwent surgical ligation and, in another dog, an ameroid constrictor was placed. Conclusions: PTCE was clinically effective in treating single extrahepatic PSS in dogs. Preoperative CT and TRP prior to PTCE might be clinically valuable for choosing the size of embolization coils, deciding the appropriate location of coil implantation, and estimating the number of coils to be implanted. PTCE is a promising alternative to conventional surgical procedures for single extrahepatic PSS in dogs. [ABSTRACT FROM AUTHOR]

Purpose: To evaluate the safety of ultrasound-guided percutaneous mesenteric vein access compared to transsplenic portal vein access for portosystemic shunt placement in patients with portal vein obstruction. Materials and Methods: Eight patients underwent portosystemic shunt creation through either a transsplenic (n = 4) or transmesenteric (n = 4) approach. The superior or inferior mesenteric vein was percutaneously accessed under ultrasound guidance using a 21G needle and a 4F sheath. Hemostasis at the mesenteric access site was achieved with manual compression. For transsplenic access, sheath sizes between 6 and 8F were used and tract embolization with gelfoam was performed. Results: Portosystemic shunt placement was successful in all patients. While there were no bleeding complications with transmesenteric access, hemorrhagic shock requiring splenic artery embolization occurred in one patient in which the transsplenic approach was used. Conclusion: Ultrasound-guided mesenteric vein access seems feasible and a valid alternative to the transsplenic access in case of portal vein obstruction. Level of Evidence Level 4, case series. [ABSTRACT FROM AUTHOR]

Background: Hepatic encephalopathy, (HE) although commonly associated with cirrhosis, has also been reported in non-cirrhotic portal hypertension (NCPH). The importance of identifying and treating HE in NCPH lies in the fact that many patients may be wrongly diagnosed as having psychiatric or neurologic disorders. Hence, we aimed to systematically review the prevalence of HE in NCPH. Methods: A comprehensive search of three databases (Medline, Embase and Scopus) was conducted from inception to November 2022 for studies reporting on the prevalence of minimal HE (MHE) and overt HE (OHE) in patients with NCPH. Results were presented as pooled proportions with their 95% confidence intervals (CI). Results: Total 25 studies (n = 1487) were included after screening 551 records. The pooled prevalence of MHE in NPCH was 32.9% (95% CI: 26.7–39.0) without any difference between adult (32.9%, 95% CI: 23.5–42.3) and pediatric patients (32.6%, 95% CI: 26.1–39.1) (p = 0.941). There was no significant difference in the prevalence between patients with NCPH and compensated cirrhosis with odds ratio of 1.06 (95% CI: 0.77–1.44). The pooled event rate for prior history of OHE in NCPH was 1.2% (95% CI: 0.3–2.1). Conclusion: Around one-third of the patients with NCPH have MHE, irrespective of age group. OHE is extremely rare in NCPH and is usually associated with a precipitating factor. [ABSTRACT FROM AUTHOR]

Aim: To determine the outcomes concerning portal venous blood flow and portosystemic shunts in patients with decompensated cirrhosis due to hepatitis C virus (HCV) infection who achieved sustained viral response (SVR) following antiviral therapy. Methods: Portal hypertension‐related events and liver function were evaluated in 24 patients achieving SVR following sofosbuvir plus velpatasvir therapy. Results: Serum albumin level (median; g/dL) increased from 2.9 at baseline to 3.5 at 12 weeks after the end of treatment (EOT) (p = 0.005), while liver volumes (cm3) decreased from 1260 to 1150 (p = 0.0002). Portal hypertension‐related events developed in 10 patients (41.7%), and the cumulative occurrence rates after the EOT were 29.2%, 33.3%, and 46.1% at 24, 48, and 96 weeks, respectively. Multivariate logistic regression analysis revealed that the maximal diameter of the shunts (p = 0.0235) was associated with the development of the events, with a cut‐off value of 8.3 mm (p = 0.0105). Meanwhile, multiple linear regression analysis revealed that portal venous blood flow, liver volume, serum albumin, and bilirubin levels at baseline were associated with serum albumin levels at 12 weeks after EOT (p = 0.0019, p = 0.0154, p = 0.0010, and p = 0.0350, respectively). Conclusion: In patients with decompensated cirrhosis due to HCV infection, the baseline portal venous blood flow and liver volume and function were predictive of liver function following SVR, while the maximal diameter of portosystemic shunts predicted the occurrence of portal hypertension‐related events. [ABSTRACT FROM AUTHOR]

Abstract Background Scrotal swelling from varicocele is a common complaint in adult men. Varicocele due to portosystemic collaterals is a rare presentation of portal hypertension. Imaging workup and intervention for varicocele in this case is more complex than varicocele due to absent or incompetent valves in the testicular veins and pampiniform plexus. Case presentation We present the case of a 53-year-old man with alcohol-related cirrhosis presented with persistent left scrotal heaviness, pain, and swelling found to have a large left varicocele. Given his history of cirrhosis, a contrast-enhanced CT of the abdomen and pelvis was obtained showing that the varices were supplied by a vessel arising from the splenic vein and draining into the left renal vein as well as gastric varices. Varicocele embolization alone is not sufficient in this case, and we treated with transjugular intrahepatic portosystemic shunt, variceal and varicocele embolization. Conclusion In patients presenting with a varicocele with a history of cirrhosis/portal hypertension, cross sectional imaging of the abdomen and pelvis should be obtained prior to treatment to evaluate for the presence of varices which may be pressured by varicocele embolization. If present, consideration should be given to referral to an interventional radiologist for possible concurrent variceal embolization and TIPS placement.

Abstract Background Detection of ‘spontaneous’ portosystemic collateral veins (PSCV) serves as an important tool in diagnosing portal hypertension (PTHN) and predicting prognosis. Multidetector computed tomography (MDCT) imaging is noninvasive and allows accurate assessment of variceal site and size. So, this study was conducted to assess the role of MDCT in predicting, detecting and grading gastroesophageal varices in correlation with endoscopy in cirrhotic patients in relation to other portosystemic collaterals. Methods Analytical cross-sectional prospective study was conducted on 100 cirrhotic patients. All patients were subjected to history taking, upper gastrointestinal endoscopic assessment, and triphasic CT or contrast-enhanced CT assessment of abdomen and pelvis. Results Patients who had esophageal varices in MDCT show a statistically significant difference (p = 0.016) with its endoscopic grading. There was good agreement between endoscopy and MDCT in diagnosing grade of esophageal varices as k = 0.882. The presence of ascites, splenic size, and esophageal vein diameter serve as clinically significant predictors of esophageal varices. Splenic size showed a significant difference according to endoscopic grades of EV (esophageal varices) as p = 0.031 as patients with no varices had splenic size of (15.9 ± 1.4) cm, patients with grade I had a mean splenic size of (15.2 ± 8.7) cm, patients with grade II had mean splenic size of (16.9 ± 1.8) cm and patients with grade III had mean splenic size of (18 ± 4.2) cm, while other veins diameters showed increase with advanced grades of EV but with statistically insignificant differences as p > 0.05. Conclusions Multidetector CT features of the presence of PSCVs, splenic size, and ascites are accurate predictors of PTHN in either EVs presence or absence. MDCT can be an excellent alternative for patients who are contraindicated for endoscopy. Moreover, it can be potential screening tool for early detection of esophageal varices in very early stage of chronic liver disease and in the early care of patient with varices. MDCT remains the most applicable noninvasive diagnostic tool for patients with portosystemic collaterals.

Abstract Background This study aimed to investigate the safety, preliminary clinical experience, and technical advantages of double C-arm digital subtraction angiography -assisted portal vein puncture for transjugular intrahepatic portosystemic shunt. Methods Clinical data of 25 patients with portal hypertension caused by liver cirrhosis were retrospectively analyzed from January 2021 to June 2022. The fluoroscopy time, puncture time, mean portosystemic pressure gradient, dose area product, and intraoperative and postoperative complications were recorded. Results Transjugular intrahepatic portosystemic shunt was performed in all 25 patients, with a success rate of 100%. The fluoroscopy time, puncture time, and dose area product were 33.6 ± 8.5 min, 9.1 ± 5.7 min, and 126 ± 53 Gy·cm2, respectively. The mean portosystemic pressure gradient decreased from 22.5 ± 6.3 mmHg to 10.5 ± 2.3 mmHg (p

Atypical variceal bleeding, which primarily stems from extrahepatic portal vein obstruction (EHPVO), is a severe complication of pancreatic hepatobiliary surgery. This review provides insights into this condition’s incidence, diagnosis, and management strategies. The treatment modalities for atypical variceal bleeding resulting from EHPVO range from endoscopic intervention to surgical procedures, including direct variceal ligation and shunt surgery. Here, we discuss the efficacy and potential limitations of each treatment approach. Additionally, we explored the utility and therapeutic advantages of the meso-Rex shunt, a particularly promising surgical technique for mitigating the hemodynamic and metabolic impacts of EHPVO.

Objective: The objective of this study was to evaluate differences in outcomes in dogs treated for extrahepatic portosystemic shunts (EHPSS) by either complete suture ligation, partial suture ligation or medical management. Study design: This wasa retrospective, single institutional study. Sample population: Dogs (n = 152) with EHPSS treated with suture ligation (n = 62), surgery with no ligation (n = 2), or medical management (n = 88). Methods: Medical records were reviewed for data on signalment, treatment variables, complications, and outcome. Kaplan–Meier plots were generated to assess survival across groups. Cox's proportional hazard models were used to assess the relationship between survival times and multiple predictor variables. For outcomes of interest, backwards, stepwise regression was performed (p < 0.05). Results: Complete suture ligation was possible in 46/64 (71.9%) of dogs where surgical attenuation was attempted. One dog was euthanized following partial suture ligation due to suspected portal hypertension. Dogs with complete suture ligation of the EHPSS had a significantly longer median survival time (MST) compared to the medical management group (MST not reached vs. 1730 days [p < 0.001]). Complete resolution of clinical signs (without the need for further medical treatment or dietary changes) was achieved in 16/20 (80.0%) dogs with complete suture ligation and 4/10 (40.0%) dogs with partial suture ligation of their EHPSS. Conclusion: Suture ligation (complete or partial) for the treatment of EHPSS, where clinically possible, yielded the best clinical outcome and increased longevity compared to medical management in this study. Clinical Significance: While medical management for the treatment of EHPSS in dogs is a valid treatment option, better clinical outcomes are achieved with surgical intervention. [ABSTRACT FROM AUTHOR]

Simple Summary: A congenital portosystemic shunt is an abnormal vessel that bypasses the liver. Dogs born with this shunt may display various clinical signs due to substances that are usually metabolized by the liver being present in much higher levels in the bloodstream. Surgery to narrow or close the shunt is recommended. Materials placed to narrow the shunt aim to close the shunt fully over time by creating an inflammatory reaction around the shunt, although some dogs may also receive a second surgery if this is not successful. Multiple acquired shunts may also develop following the narrowing or closure of a congenital shunt; these represent the opening of previously non-functional vessels to relieve increased pressure within the liver. The main objective of this study was to report the outcome for dogs treated with a 'complete ligation where possible' philosophy. The second aim was to compare the outcome between complete polypropylene suture ligation and partial thin film band narrowing of the congenital extrahepatic portosystemic shunt in dogs. Dogs that could not tolerate acute complete shunt ligation at surgery received partial shunt narrowing with a thin film band. Of the 110 dogs enrolled, 57 received complete ligation and 53 received partial thin film band narrowing of the shunt. Peri-operative mortality, the occurrence of post-attenuation neurological complications, the occurrence of multiple acquired shunts, the postoperative clinical shunt score and quality of life score was not significantly different between the two groups. The main objective was to conduct a prospective study reporting the outcome for dogs with an extrahepatic congenital portosystemic shunt (CPSS) treated with a 'complete ligation where possible' philosophy. The second aim was to compare the outcomes following complete (C) polypropylene suture ligation versus partial thin film band (TFB) attenuation of a CPSS in dogs. Dogs that could not tolerate acute complete shunt ligation at surgery received partial shunt attenuation with TFB. Peri-operative complications, mortality, follow-up imaging findings, pre- and post-operative bile acid stimulation test results and details of any revision surgery performed were recorded. A follow-up health-related quality of life questionnaire enabled the calculation of a postoperative clinical shunt score, a quality of life score, and determined if any dogs were still on a hepatic diet and/or other medical management at a minimum of 6 months after surgery. Of the 110 dogs enrolled, 57 received complete ligation and 53 received partial TFB attenuation. Peri-operative mortality, the occurrence of post-attenuation neurological complications, the occurrence of multiple acquired shunts, the postoperative clinical shunt score and quality of life score were not significantly different between the two groups. Dogs in the C group were older, heavier and demonstrated a greater number of shunt classifications where the entry into the systemic circulation was the phrenic vein or azygous vein. Dogs in the TFB group had a greater number of unchanged bile acid concentrations after surgery, were more likely to remain on the hepatic diet and/or medical management after surgery and underwent a greater number of revision surgeries. There was variability in the precision of both ultrasound and computed tomographic angiography follow-up imaging compared to intra-operative mesenteric portovenography findings at revision surgery. Overall, dogs with an extrahepatic portosystemic shunt receiving either complete acute shunt ligation or partial TFB shunt attenuation are expected to have an excellent long-term clinical outcome and there is no reason to suggest that a dog able to tolerate complete acute shunt closure should be denied the benefit of this. [ABSTRACT FROM AUTHOR]

Simple Summary: Portosystemic shunt (PSS) is a common abnormality in dogs where through an aberrant vessel, blood from the intestines bypasses the liver. Lack of hepatic detoxication can lead to a fatal outcome. The treatment of choice is a surgical closure of the shunt. In the case of the intrahepatic location of the shunt, its identification is often difficult and requires traumatic preparation of the liver, which influences the postoperative prognosis. Therefore, in order to reduce liver trauma, we printed 3-dimensional (3D) individual patient liver models, scaled 1:1, and used them for planning the surgery and as a guide during intraoperative identification of the shunt. Here, we present the application of this method in four dogs with intrahepatic PSS. The advantages of the 3D technology are simple and precise planning of the surgery, fast intraoperative identification of the shunt, and low invasive dissection of the liver parenchyma. We conclude that 3D technology can potentially raise the recovery rate. Laparotomic attenuation of an intrahepatic portosystemic shunt (IHPSS) is more difficult than an extrahepatic one, and results in a higher risk of complications because the identification of the aberrant vessel in the liver remains often a challenge. Excessive preparation and traction of the parenchyma results in trauma, bleeding, and prolonged surgery, which is what worsens the prognosis. Therefore, based on computed tomographic angiography, we printed 3-dimensional (3D) individual patient liver models, scaled 1:1, and used them for surgery planning and as a guide during intraoperative identification of the shunt in four dogs with IHPSS. The advantages of the 3D technology are simple and precise planning of the surgery, fast intraoperative identification of the shunt, and low invasive dissection of the liver parenchyma. We conclude that 3D technology can potentially raise the recovery rate. To the best of our knowledge, this was the first application of 3D models in the surgery of canine IHPSS. [ABSTRACT FROM AUTHOR]

The case includes a 7-month-old puppy poodle applied to a private hospital for weakness, tremors and seizure attacks. Clinical examination findings were normal. From blood samples, biochemical parameter measurements were carried out. The values of alkaline phosphatase (ALP), alanine aminotransferase (ALT), ammonia and fasting serum bile acids were high and the blood urea nitrogen (BUN) value was low. Ultrasonographic examination, shunted vein in the liver to the vena cava caudalis, that is colour Doppler observed the extrahepatic shunt and turbulent flow in this shunted. Depending on clinical, laboratory (hemogram and biochemistry) and ultrasonographic observations, portosystemic shunt (PSS) was diagnosed and controlled one month after the treatment was recommended. The medical treatment included a hepatic formula diet (liver care), lactulose 0.5 ml/kg three times a day, metronidazole 15 mg/kg twice a day, S-adenosyl Methionine 15 mg/kg once a day, 400 international unite (IU) vitamin E once a day for 30 days. When turbulent flow is observed in the shunted vein in the liver to vena cava caudalis, ultrasound examination with color Doppler can help diagnose portosystemic shunt. After the treatment, clinical improvement was observed and clinical symptoms of hepatic encephalopathy including seizures and tremors, disappeared completely. Determination of turbulent flow with colour Doppler and decreased portal flow velocity with portal hypertension with PW-Doppler ultrasonography are important for the diagnosis of the portosystemic shunt. It was concluded that medical treatments might help before surgical treatments in portosystemic shunts.

Abstract Background Congenital portosystemic shunt is an infrequent abnormal connection between the portal vascular system and the systemic circulation. Portosystemic shunts are common findings in patients with cirrhosis, causing gastroesophageal varices, hepatic encephalopathy, and others. However, there is no consensus or literature describing how to manage asymptomatic patients with portosystemic shunts and normal liver. Case presentation The patient was a 39-year-old female who underwent donor right hepatectomy for living donor liver transplantation. The patient was healthy by nature, however, developed hepatic encephalopathy after the surgery due to a development of portosystemic shunt. Portosystemic shunt stole portal blood flow, and imaging modalities revealed narrowing of the portal trunk, representing prolonged depletion of portal blood flow. Balloon-occluded retrograde transvenous obliteration (B-RTO) was performed for occlusion of the portosystemic shunt. B-RTO increased portal blood flow, and hepatic encephalopathy with hyperammonemia was successfully resolved without the outbreak of any other symptom of portal hypertension. Conclusions A congenital portosystemic shunt itself is not a contraindication for donor hepatectomy, but perioperative endovascular shunts occlusion or intraoperative ligature of these shunts should be considered.

Abernethy malformation or congenital portosystemic shunt is a rare congenital vascular malformation and anomaly of the splanchnic venous system defined by diverting portal blood away from the liver. It is commonly associated with multiple congenital anomalies. Imaging modalities such as computed tomography or magnetic resonance have a crucial role in prompting diagnosis and determining the prognosis based on the type of malformation and associated anomalies. Misdiagnosis could be harmful and may lead to inappropriate treatment. We present a case of Abernethy malformation with a complete end-to-side shunt of portal venous flow into the systemic venous flow and complete bypass of the liver, which was initially misdiagnosed with portal venous thrombosis.

Spontaneous asymptomatic intrahepatic portosystemic shunt is a rare anomaly of the hepatic vasculature. The main clinical manifestations may be encephalopathy, bleeding or hyperinsulinism, due to the constant shedding of blood. This article presents a case of an asymptomatic congenital intrahepatic portosystemic shunt, found in patient I., aged 25, with the results of various imaging methods, as well as an analysis of the main types of the described vascular anomaly.

Abstract Aim The aim of this study is to compare the prognostic values of the Child–Pugh, integrated model for end‐stage liver disease (iMELD), albumin–bilirubin (ALBI), and Freiburg index of postsurvival (FIPS) scores in patients undergoing transjugular intrahepatic portosystemic shunt (TIPS). Methods We conducted a multicenter retrospective study including patients who underwent TIPS by collecting data from several hospitals in southwest China between January 2014 and February 2021. We compared the performance of different scoring models for survival prediction in these patients. The performance of each scoring model was assessed via area under the receiver‐operating characteristic (AUROC) curve analysis. Results The study included 378 TIPS patients (268 men, 110 women; median age 52 [interquartile range, 45–60] years). Age; cirrhosis etiology; ascites severity; albumin levels; international normalized ratio; total bilirubin levels; sodium levels; and Child–Pugh, iMELD, ALBI, and FIPS scores were significant prognostic factors in cirrhotic patients who underwent TIPS. The Child–Pugh, iMELD, ALBI, and FIPS scores were all independent predictors of survival in TIPS patients. Survival analysis showed that all scoring models effectively stratified the prognostic risk of these patients. The Child–Pugh score was the best predictor of postoperative survival, followed by the ALBI and FIPS scores. The iMELD score was the worst predictor. The Child–Pugh, iMELD, ALBI, and FIPS scores predicted the 1‐year postoperative survival, with AUROC values of 0.832, 0.677, 0.761, and 0.745, respectively, and the 3‐year postoperative survival, with AUROC values of 0.710, 0.668, 0.721, and 0.658, respectively. The calibration curve showed that the Child–Pugh, ALBI, and FIPS models performed well in predicting 1‐ and 3‐year survival, whereas the iMELD model was a poor predictor. Conclusions The four scoring models can predict survival in cirrhotic patients after TIPS and can effectively stratify prognostic risk. The Child–Pugh score may be more suitable for predicting survival after TIPS in patients with liver cirrhosis.