Publications by authors named "Patrick H Y Chung"

Article Synopsis
  • Kasai portoenterostomy (KPE) is the main treatment for biliary atresia (BA), but predicting outcomes is difficult due to unreliable biomarkers.
  • Researchers analyzed liver biopsies from BA patients before and after KPE and compared them to control liver samples, focusing on gene expression changes.
  • Findings suggest that high hepatocyte expression in KPE organoids may indicate abnormal cholangiocyte development, while a transition towards more cholangiocyte features in surviving patients suggests better biliary recovery.
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Background And Objective: Biliary atresia (BA) is characterized by biliary inflammation and obstruction. In the later phase, liver fibrosis occurs. Although the etiology of BA is believed to be multi-factorial, genetic predisposition has been proposed to play a critical role in the pathogenesis.

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Purpose: To analyze and compare the outcomes in patients with anorectal malformation with rectoprostatic and rectourethral fistula between laparoscopic-assisted anorectoplasty (LAARP) versus posterior sagittal anorectoplasty (PSARP).

Method: We performed a retrospective review on all males with anorectal malformation (ARM) with recto-prostatic (ARM-RP) or recto-bulbar urethral fistula (ARM-RB) treated in five tertiary paediatric surgical centres in the past 25 years. Defecative function was assessed using the Krickenbeck classification and Kelly's score.

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Purpose: We performed animal and organoid study to evaluate the anti-fibrotic effect of steroid on biliary atresia (BA) and the underlying patho-mechanism.

Methods: BA animal models were created by inoculation of mice on post-natal day 1 with rhesus rotavirus (RRV). They received either 20 µl phosphate-buffered saline (PBS) or steroid from day 21 to day 34.

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Omphalocele and gastroschisis are the most common types of abdominal wall defects. Comprehensive local experience helps parents to make decisions on the pregnancy and foresee the disease journey. A retrospective review of abdominal wall defect patients in all three pediatric surgical centers in Hong Kong between January 2003 and February 2023 was conducted.

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Article Synopsis
  • - This study focused on understanding portal hypertension (PHT) and its predictors in patients who survived biliary atresia (BA) after undergoing a surgical procedure called Kasai portoenterostomy (KPE).
  • - Researchers analyzed data from 320 patients across six centers in East Asia, finding that 37.8% developed PHT by five years post-KPE, particularly those who had the surgery later in life.
  • - Key findings revealed that higher bilirubin levels at one year post-KPE are linked to increased PHT risk, highlighting the importance of early surgery and ongoing monitoring for patients showing persistent jaundice.
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Purpose: This study evaluated the outcome of pediatric patients with primary vesicoureteral reflux (VUR) and compared of the treatments between continued antibiotic prophylaxis (CAP) and endoscopic injection.

Methods: The clinical data of children diagnosed with primary vesicoureteral reflux from March 2015 to June 2020 who were treated with antibiotics or endoscopic injection were reviewed. Antibiotic was the first-chosen treatment after the diagnosis of VUR in children.

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Background: Thoracoscopy, which has an increasing role in the treatment of indexed neonatal surgical conditions, requires adequate training. To support this, the current study aimed to evaluate the feasibility and effectiveness of using live rabbit models in neonatal thoracoscopic skills training among paediatric surgeons.

Methods: Following didactic lectures and demonstrations, the participants were given hands-on opportunities to perform thoracoscopic procedures.

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Aim: Laparoscopic gastrostomy is a frequently performed procedure in children requiring long-term enteral nutrition. The role of prophylactic anti-reflux surgery during gastrostomy placements is controversial. The current study aims to evaluate the role of prophylactic anti-reflux procedures during gastrostomy placement.

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Objective: This study evaluated the quality of life (QoL) in patients who have recovered from surgical necrotizing enterocolitis (NEC).

Methods: This is a cross-sectional study conducted in a tertiary centre and patients who have received surgery for NEC between 2000 and 2014 were invited to participate. The Pediatric Quality of Life Inventory Generic (PedsQL™) Core Scale Version 4.

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Purpose: This aim of this study was to identify the pre-operative risk factors for conversion during laparoscopic excision of choledochal cyst in paediatric patients.

Methods: A retrospective single-centre study was carried out. All paediatric patients (< 18 years) who had undergone laparoscopic excision of choledochal cyst between 2004 and 2021 were reviewed.

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Background: To evaluate factors affecting length of stay (LOS) after choledochal cyst resection in paediatric patients.

Methods: This was a retrospective study on patients operated between 2004 and 2021. Associations between clinical factors and LOS were evaluated by bivariate analysis, multiple regression, and equivalence test.

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Background: Choledochal cysts (CC) are congenital bile duct anomalies with 6-30% risk for developing bile duct cancer. However, the molecular mechanisms underlying cancer risk of CC are unknown. We sought to identify the gene expression changes underlying the cancer risk of CC patients.

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Purpose: We aimed to compare the outcomes of primary anastomosis (PA) and enterostomy as treatments for intestinal atresia in neonates to identify the factors influencing the choice of modality.

Methods: We conducted a retrospective single-centre analysis of all neonates with intestinal atresia between 2000 and 2020 and measured the clinical outcomes. We performed logistic regression to identify factors that influenced the choice of surgical approach.

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Background: The age at Kasai portoenterostomy (KPE) was reported to correlate with the prognosis of patients with biliary atresia (BA) and that a late KPE is bounded to be failure. Herewith, we reported the outcome of patients receiving KPE after day 70 of life. In addition, the prognostic indicators were evaluated.

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Background: Biliary atresia (BA) is an infantile fibro-obstructive cholestatic disease with poor prognosis. An early diagnosis and timely Kasai portoenterostomy (KPE) improve clinical outcomes. Aggregation of amyloid-beta (Aβ) around hepatic bile ducts has been discovered as a factor for BA pathogenesis, yet whether plasma Aβ levels correlate with hepatic dysfunctions and could be a biomarker for BA remains unknown.

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Introduction: Biliary Atresia (BA) requires prompt diagnosis and surgical intervention to optimize its outcome. The aim of this study was to evaluate the accuracy of EHIDA in distinguishing between BA and other causes of cholestatic jaundice.

Methods: This was a retrospective study of all patients who underwent EHIDA in a tertiary center from 1997 to 2019.

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Article Synopsis
  • Biliary atresia (BA) is a serious liver condition in infants, primarily causing jaundice and often requiring liver transplants in children.
  • Recent research has led to a refined classification of BA into subtypes: isolated BA, cystic BA, syndromic BA, and cytomegalovirus-associated BA, each having distinct clinical features.
  • The study reviews the specific characteristics and molecular mechanisms of these BA subtypes to develop targeted treatment protocols for better management outcomes.
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Objective: Liver transient elastography (TE) using FibroScan® has gained popularity as a non-invasive technique to assess hepatic fibrosis by measuring liver stiffness. This study focused on biliary atresia patients post Kasai operation for more than 10 years to prospectively correlate the hepatic fibrosis score to the biochemical changes of liver fibrosis and clinical development of portal hypertensive complications.

Methods: TE was performed in 37 patients who had biliary atresia post Kasai operation done at median age of 60 days.

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Traditional carrier screening has been utilized for the detection of carriers of genetic disorders. Since a comprehensive assessment of the carrier frequencies of recessive conditions in the Southern Chinese population is not yet available, we performed a secondary analysis on the spectrum and carrier status for 315 genes causing autosomal recessive disorders in 1543 Southern Chinese individuals with next-generation sequencing data, 1116 with exome sequencing and 427 with genome sequencing data. Our data revealed that 1 in 2 people (47.

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Biliary Atresia is a devastating pediatric cholangiopathy affecting the bile ducts of the liver. In this review, we describe recent progress in the understanding of liver development with a focus on cholangiocyte differentiation and how use of technical platforms, including rodent, zebrafish and organoid models, advances our understanding of Biliary Atresia. This is followed by a description of potential pathomechanisms, such as autoimmune responses, inflammation, disturbed apical-basal cell polarity, primary cilia dysfunction as well as beta-amyloid accumulation.

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