1st April 2022

A patient presents with right upper quadrant pain and fever, suggestive of gallstone disease

A patient presents with right upper quadrant pain and fever, suggestive of gallstone disease. Her blood tests show a raised WBC, a raised CRP, normal LFTs and normal serum lipase and amylase. 

Select the SINGLE most appropriate investigation from the list below which should be performed next. Select ONE option only.