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{{Gallstones - modality}}
===How soon===
*Within a couple of hours if atypical any of the following::*Atypical symptoms (which may indicate a more serious disease of the [[biliary tract]] or [[abdomen]]), or if pain :*Pain that does not subside on analgesics.:*Suspected pancreatitis. ''See: [[Ultrasonography of pancreatitis]]''
*Otherwise, generally 4-8 weeks in Swedish practice.<ref>{{NU Hospital Group}}</ref>
==Evaluation==
[[File:Ultrasonography of a gallstone.jpg|thumb|150px]]
*'''Gallbladder''': Gallstones are seen as hyperechoic objects, that leave an acoustic shadow. In case of similarity to a polyp ([[Ultrasonography of gallbladder polyps]]), turn the patient, making gallstones changing position, while polyps remain in the same place. *'''Related structures''': Also exclude signs of cholecystitis, mainly pericholecystic fluid, gallbladder wall thickening, dilation of the bile duct, and a sonographic Murphy's sign. Further information: [[Ultrasonography of cholecystitis]]. *'''Other:''' It is also proper practice to perform a {{general upper abdominal screening}}.
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