Multiple biliary hamartomas which are also known as von Meyenburg complexes, are uncommon benign malformation of the biliary tree. 

This is often an incidental finding and the patient is asymptomatic.

Different pattern on histology causes this entity to exhibit different features on US, whether hyper- or hypoechoic. Some may demonstrate comet-tail echo.

Liver biopsy may be required in rare equivocal cases.

Differential diagnosis includes choledochal cysts and liver metastases which requires IV gadolinium to differentiate them.