Pneumobilia

Probe location: subxyphoid & transverse scan
Hyperechoic change with dirty shadow noted
at the surface of umbilical portion of left side portal vein
central distribution is a clue for pneumobilia
air patter noted within right side dilated biliary tree confirmed this

Reason for pneumobilia in this patient:
This patient had CBD stone history and history of ERCP for stone retrieval .

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