The duodenal tube test is more specific than hepatobiliary scintigraphy for identifying bile excretion in the differential diagnosis of biliary atresia

Duodenal fluid analysis is an excellent differential diagnosis method of diseases with enterohepatic circulation disturbance

Enterohepatic circulation is essential for maintaining a constant bile acid concentration. Diseases with enterohepatic circulation disturbances are usually difficult to diagnose definitively without the time-consuming and expensive genetic tests. This study analyzed and compared duodenal fluid in patients with biliary atresia (BA), familial intrahepatic cholestasis 2 (FIC2), and sodium taurocholate cotransporting polypeptide (NTCP) deficiency. This study aimed to assess the diagnostic value of duodenal fluid analysis in patients with enterohepatic circulation disturbance. This study retrospectively analyzed data from 18 patients with BA, 13 patients with FIC2, and 15 patients with NTCP deficiency. All patients completed the duodenal tube tests before receiving treatment for cholestasis. The patients were intubated through the right nasal cavity to the middle or lower duodenum, as confirmed by radiography. 3-5 mL of duodenal fluid was collected at last. Clinical presentations, laboratory data, genetic data, and so forth were collected for the analysis. Among the 3 types of diseases, levels of total bile acid (TBA), total bilirubin (TB), direct bilirubin (DB), and gamma-glutamyl transpeptidase (GGT) in duodenal fluid showed significant differences (P < .01). Compared with the same indications in duodenal fluid, levels of TBA and GGT in serum did not show significant differences between patients with FIC2 and NTCP deficiency (P > .05). Duodenal TBA/serum TBA ratio, duodenal TB/serum TB ratio, duodenal DB/serum DB ratio, and duodenal GGT/serum GGT ratio also showed significant differences between patients with BA and NTCP deficiency, between patients with FIC2 and NTCP deficiency (P < .01). For diagnosis of BA, increased GGT and absent TB, DB, and TBAs had a sensitivity of 100%, 100%, 100%, and 100%, a specificity of 86.1%, 100%, 97.2%, and 97.2%. Duodenal tube tests have been used for the diagnosis of BA for over 10 years. Our findings support the duodenal fluid analysis as a tool for prompt timely diagnosis of BA. This study also indicates that the test is a useful diagnostic method with high accuracy for other diseases with enterohepatic circulation disturbance.

Diagnostic Efficacy of Advanced Ultrasonography Imaging Techniques in Infants with Biliary Atresia (BA): A Systematic Review and Meta-Analysis

The early diagnosis of biliary atresia (BA) in cholestatic infants is critical to the success of the treatment. Intraoperative cholangiography (IOC), an invasive imaging technique, is the current strategy for the diagnosis of BA. Ultrasonography has advanced over recent years and emerging techniques such as shear wave elastography (SWE) have the potential to improve BA diagnosis. This review sought to evaluate the diagnostic efficacy of advanced ultrasonography techniques in the diagnosis of BA. Six databases (CINAHL, Medline, PubMed, Google Scholar, Web of Science (core collection), and Embase) were searched for studies assessing the diagnostic performance of advanced ultrasonography techniques in differentiating BA from non-BA causes of infantile cholestasis. The meta-analysis was performed using Meta-DiSc 1.4 and Comprehensive Meta-analysis v3 software. Quality Assessment of Diagnostic Accuracy Studies tool version 2 (QUADAS-2) assessed the risk of bias. Fifteen studies consisting of 2185 patients (BA = 1105; non-BA = 1080) met the inclusion criteria. SWE was the only advanced ultrasonography technique reported and had a good pooled diagnostic performance (sensitivity = 83%; specificity = 77%; AUC = 0.896). Liver stiffness indicators were significantly higher in BA compared to non-BA patients (p < 0.000). SWE could be a useful tool in differentiating BA from non-BA causes of infantile cholestasis. Future studies to assess the utility of other advanced ultrasonography techniques are recommended.

Discovery of Candidate Stool Biomarker Proteins for Biliary Atresia Using Proteome Analysis by Data-Independent Acquisition Mass Spectrometry

Biliary atresia (BA) is a destructive inflammatory obliterative cholangiopathy of the neonate that affects various parts of the bile duct. If early diagnosis followed by Kasai portoenterostomy is not performed, progressive liver cirrhosis frequently leads to liver transplantation in the early stage of life. Therefore, prompt diagnosis is necessary for the rescue of BA patients. However, the prompt diagnosis of BA remains challenging because specific and reliable biomarkers for BA are currently unavailable. In this study, we discovered potential biomarkers for BA using deep proteome analysis by data-independent acquisition mass spectrometry (DIA–MS). Four patients with BA and three patients with neonatal cholestasis of other etiologies (non-BA) were recruited for stool proteome analysis. Among the 2110 host-derived proteins detected in their stools, 49 proteins were significantly higher in patients with BA and 54 proteins were significantly lower. These varying stool protein levels in infants with BA can provide potential biomarkers for BA. As demonstrated in this study, the deep proteome analysis of stools has great potential not only in detecting new stool biomarkers for BA but also in elucidating the pathophysiology of BA and other pediatric diseases, especially in the field of pediatric gastroenterology.