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[Hepatobiliary scintigraphy in the study of neonatal hepatic cholestasis]
M Salvatori1, V Valenza, A De Franco
1Istituto di Medicina Nucleare, Università Cattolica del S. Cuore, Roma.
Insights
Hepatobiliary scintigraphy after phenobarbital aids in diagnosing neonatal cholestasis causes like biliary atresia and hepatitis. This noninvasive method is crucial for diagnosis and monitoring surgical outcomes.
Area of Science:
- Pediatric Gastroenterology
- Hepatology
- Diagnostic Imaging
Background:
- Neonatal cholestasis presents diagnostic challenges, differentiating intrahepatic (hepatitis) from extrahepatic (biliary atresia) causes.
- Accurate diagnosis is critical as prognosis and treatment differ significantly between hepatitis and biliary atresia.
Purpose of the Study:
- To evaluate the efficacy of hepatobiliary scintigraphy, with and without phenobarbital stimulation, in differentiating neonatal hepatitis from biliary atresia.
- To assess the utility of hepatobiliary scintigraphy in the postoperative follow-up of patients with biliary atresia.
Main Methods:
- Retrospective analysis of 18 pediatric patients with severe neonatal cholestasis.
- Utilized ultrasound (US) and hepatobiliary scintigraphy, with some patients receiving phenobarbital.
- Correlated imaging findings with clinical diagnoses and surgical outcomes.
Main Results:
- Ultrasound findings were non-specific for differentiating hepatitis and biliary atresia.
- Hepatobiliary scintigraphy after phenobarbital showed bile excretion into the bowel in hepatitis cases.
- Absence of intestinal radioactivity within 24 hours was characteristic of biliary atresia.
- Scintigraphy effectively monitored anastomotic function after Kasai's operation and liver transplantation.
Conclusions:
- Hepatobiliary scintigraphy after phenobarbital administration is a valuable noninvasive tool for diagnosing neonatal cholestasis and managing biliary atresia.
- The procedure aids in both initial diagnosis and postoperative assessment of surgical interventions.
Abstract:
Severe neonatal cholestasis is a clinical problem requiring a differential diagnosis of intra- (hepatitis) and extrahepatic (biliary atresia) causes, prognosis and therapy being different in the two cases. Eighteen patients of pediatric age underwent US and hepatobiliary scintigraphy. US findings were aspecific in both hepatitis and biliary atresia. In the 11 patients with hepatitis, hepatobiliary scintigraphy after phenobarbital revealed labeled bile in the bowel. Only in 1 patient with cytomegalovirus hepatitis was a scintigraphic pattern similar to that of biliary atresia. On the contrary, no intestinal radioactivity within 24 hours was seen in 6 patients with biliary atresia. A portoenterostomy (Kasai's operation) was performed on 4/6 cases with biliary atresia. These patients were followed with hepatobiliary scintigraphy in order to evaluate anastomotic functionality. In a case of biliary cirrhosis secondary to occlusion, orthotopic liver transplantation was performed whose success was scintigraphically monitored. Our results point to hepatobiliary scintigraphy after phenobarbital as the best noninvasive procedure for both diagnosis and postoperative follow-up of biliary atresia. Labeled bile excretion within 24 hours was rarely found in both atresia and neonatal hepatitis.