Prevalence and pattern of growth abnormalities in children with extrahepatic portal vein obstruction: Response to shunt surgery

Noncirrhotic portal hypertension: current trends and future directions

PURPOSE OF REVIEW

Noncirrhotic portal hypertension (NCPH) comprises a diverse group of vascular liver disorders characterized by elevated portal pressure without cirrhosis. Due to overlapping clinical features, distinguishing NCPH from cirrhosis and porto-sinusoidal vascular disorder (PSVD) remains challenging. This review explores recent advancements in diagnosis, differentiation, and evolving treatment strategies.

RECENT FINDINGS

NCPH is characterized by preserved liver function and near-normal hepatic venous pressure gradients (HVPG). It shares risk factors with PSVD, including infections, drugs, toxins, and prothrombotic conditions. Diagnostic advancements, such as liver stiffness measurement (LSM) and splenic stiffness measurement (SSM), offer noninvasive differentiation from cirrhosis, while liver biopsy remains crucial for confirming PSVD and noncirrhotic portal fibrosis (NCPF). Imaging is reliable for diagnosing extrahepatic portal vein obstruction (EHPVO). Transjugular intrahepatic portosystemic shunts (TIPS) for refractory variceal bleeding or ascites, achieving rebleeding control in 72-80% of cases. Surgical shunts and splenectomy remain essential for uncontrolled bleeding and portal biliopathy, demonstrating excellent variceal control (93-95%).

SUMMARY

NCPH requires a high index of suspicion for diagnosis. Differentiation from cirrhosis and PSVD relies on clinical, histological, and hemodynamic assessments. Management focuses on endoscopic, interventional, and surgical strategies tailored to disease severity. Future research should standardize diagnostic criteria, explore targeted therapies, and refine prognostic tools to improve outcomes.

Porto-sinusoidal Vascular Disease and Portal Hypertension

Porto-sinusoidal vascular disease (PSVD) is the medical diagnosis for a patient who has portal hypertension in the absence of cirrhosis on liver biopsy. There are several specific histologic findings for PSVD, including obliterative portal venopathy, nodular regenerative hyperplasia, and incomplete septal fibrosis. Epidemiologic reports vary widely among regions; PSVD comprises less than 10% of causes of portal hypertension in Western countries but incidence has been found to be as high as 48% in India. There is an expansive list of etiologies that have been reported to cause PSVD.

Extrahepatic Portal Vein Thrombosis, an Important Cause of Portal Hypertension in Children

One of the most important causes of portal hypertension among children is extrahepatic portal vein thrombosis (EHPVT). The most common risk factors for EHPVT are neonatal umbilical vein catheterization, transfusions, bacterial infections, dehydration, and thrombophilia. Our study aimed to describe the clinical manifestations, treatment, evolution, and risk factors of children with EHPVT.

METHODS

We analyzed retrospectively all children admitted and followed in our hospital with EHPVT between January 2011-December 2020. The diagnosis was made by ultrasound or contrast magnetic resonance imaging. We evaluated the onset symptoms, complications, therapeutic methods, and risk factors.

RESULTS

A total of 63 children, mean age 5.14 ± 4.90 (33 boys, 52.38%), were evaluated for EHPVT during the study period. The first symptoms were upper gastrointestinal bleeding (31 children, 49.21%) and splenomegaly (22 children, 34.92%). Thrombocytopenia was present in 44 children (69.84%). The most frequent risk factors were umbilical vein catheterization (46 children, 73.02%) and bacterial infections during the neonatal period (30 children, 47.62%). Protein C, protein S, antithrombin III levels were decreased in 44 of the 48 patients tested. In 42 of these cases, mutations for thrombophilia were tested, and 37 were positive. Upper digestive endoscopy was performed in all cases, revealing esophageal varices in 56 children (88.89%). All children with gastrointestinal bleeding received an octreotide infusion. In 26 children (41.27%), variceal ligation was performed, and in 5 children (7.94%), sclerotherapy. Porto-systemic shunt was performed in 11 children (17.46%), and Meso-Rex shunt was done in 4 children (6.35%). The evolution was favorable in 62 cases (98.41%). Only one child died secondary to severe sepsis.

CONCLUSIONS

EHPVT is frequently diagnosed in the last period in our region due to the increased use of umbilical vein catheterization. Furthermore, genetic predisposition, neonatal bacterial infections, and prematurity certainly play an important role in this condition. A proactive ultrasound assessment of children with risk factors for EHPVT should be encouraged for early diagnosis and treatment.

Evaluation of growth and nutritional status in children and adolescents with extrahepatic portal vein obstruction and portal hypertension

ABSTRACT Objective: This study aims to evaluate dietary intake, nutritional status, and growth rate in children and adolescents with extrahepatic portal vein obstruction and portal hypertension. Methods: Outpatients aged 1-18 years, diagnosed with extrahepatic portal vein obstruction and portal hypertension, who had no associated diseases, and who had not been subjected to a venous shunt were included in this study. Two evaluations were carried out in this study: an initial (evaluation 1) and a final evaluation (evaluation 2), with a three-month minimum interval between them. In each evaluation, dietary intake was analyzed comparing the results with recommended energy intake using the Harris & Benedict equation and participants’ anthropometric data, such as weight, height, mid-arm muscle circumference, weight-for-age, height-for-age, and body mass index-for-age, based on the World Health Organization 2006 standards. Results: A total of 22 patients participated in this study. There was a significant improvement in weight, height, body mass index, and mid-arm muscle circumference measurements (p<0.001; p<0.001; p<0.017; p=0.0018 respectively) and in the relationship between dietary intake and energy recommended energy intake, according to the Harris & Benedict equation (p=0.0001) from the first and second evaluation. Conclusion: Extrahepatic portal vein obstruction and portal hypertension were not shown to be factors predisposing to malnourishment.