Hepatobiliary scanning in the diagnosis of biliary atresia

Area of Science:

• Pediatric Radiology
• Hepatology
• Nuclear Medicine

Background:

• Neonatal cholestasis requires prompt diagnosis for effective treatment.
• Biliary atresia is a primary cause of neonatal cholestasis, necessitating early identification.
• Hepatobiliary scintigraphy is a non-invasive imaging modality used in pediatric liver disease evaluation.

Purpose of the Study:

• To evaluate the diagnostic utility of hepatobiliary scanning in identifying biliary atresia among infants with cholestasis.
• To determine the sensitivity and specificity of hepatobiliary scanning for biliary atresia diagnosis.

Main Methods:

• Retrospective analysis of 33 hepatobiliary scans from 30 children diagnosed with cholestasis.
• Utilized a Multispect camera and intravenous injection of 99mTc-MBrIDA.
• Assessed radiotracer passage into the intestinal tract as an indicator of biliary patency.

Main Results:

• Hepatobiliary scanning demonstrated 100% sensitivity and 75% specificity for biliary atresia.
• 23 out of 30 patients showed no radiotracer excretion into the intestines.
• 18 patients were diagnosed with biliary atresia, confirmed surgically; 3 had intrahepatic cholestasis.

Conclusions:

• Hepatobiliary scanning is a highly sensitive tool for diagnosing biliary atresia in neonatal cholestasis.
• While sensitive, its specificity necessitates integration with clinical, biochemical, and other radiological data for definitive diagnosis.
• Intraoperative cholangiography may be required in complex cases to confirm the diagnosis.