Hepatobiliary scintigraphy and sonography in early biliary obstruction

Area of Science:

• Medical Imaging
• Gastroenterology
• Hepatobiliary System Diagnostics

Background:

• Early, partial, or intermittent biliary obstruction presents diagnostic challenges.
• Conventional imaging may not reliably detect subtle signs of obstruction.

Purpose of the Study:

• To evaluate the diagnostic agreement between sonography and hepatobiliary scintigraphy.
• To assess the utility of these modalities in identifying early or low-grade biliary obstruction.

Main Methods:

• Retrospective analysis of 139 patients with suspected biliary obstruction.
• Utilized sonography, hepatobiliary scintigraphy, and contrast cholangiography.
• Compared diagnostic findings between sonography and scintigraphy in 125 patients with confirmed diagnoses.

Main Results:

• Sonography and scintigraphy showed disagreement in 23% (29/125) of patients.
• Scintigraphy identified obstruction in 13 patients without sonographic ductal dilation.
• Seven patients with prior biliary interventions showed normal scintigraphic clearance despite dilation.

Conclusions:

• Disagreement between sonography and scintigraphy is common in suspected early biliary obstruction.
• Sonographic absence of ductal dilation does not exclude the presence of biliary obstruction.
• Hepatobiliary scintigraphy offers valuable insights in cases with equivocal sonographic findings.