• Gallbladder polyps are typically identified on ultrasonography, which has a sensitivity and specificity of over 90%.

Shown below are ultrasound images of gallbladder polyps. Images courtesy of Professor Peter Anderson DVM PhD and published with permission © PEIR, University of Alabama at Birmingham, Department of Pathology

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  USG: Gallbladder: Adenomatous polyp
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  51-year-old male with right lower quadrant pain. Two small polyps are seen within the gallbladder (the largest of which measures 7mm)
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  Two small polyps are seen within the gallbladder (the largest of which measures 7mm).

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  Two small polyps are seen within the gallbladder (the largest of which measures 7mm)
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  Two small polyps are seen within the gallbladder (the largest of which measures 7mm)
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  Two small polyps are seen within the gallbladder (the largest of which measures 7mm)

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  Two small polyps are seen within the gallbladder (the largest of which measures 7mm)
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  Two small polyps are seen within the gallbladder (the largest of which measures 7mm)
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  Two small polyps are seen within the gallbladder (the largest of which measures 7mm)

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  Two small polyps are seen within the gallbladder (the largest of which measures 7mm)
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  Two small polyps are seen within the gallbladder (the largest of which measures 7mm)

• ERCP (Endoscopic Retrograde Cholangiopancreatography)
• Contrast enhanced CT may aid in the diagnosis with an overall accuracy of 87% for cancer.
• HIDA Scan (Cholescintigraphy): Hepatobiliary iminodiacetic acid scan
• FDG-PET adds little to the CT.

• Importantly, endoscopic ultrasound, which permits detailed evaluation of the gallbladder wall, has excellent diagnostic capabilities and should be used for indeterminate polyps of 5-15 mm.