Biliary Tract: Biliary Dyskinesia Biliary Dyskinesia BasicsDefinition: Ineffective Gallbladder ContractionPresentation: Biliary Colic without Stones or Sludge & Normal LabsDiagnosisDiagnosis: CCK-Stimulated Cholescintigraphy (HIDA Scan)> 60 min to Empty or Ejection Fraction (EF) < 35% at 20 MinutesTreatmentTreatment: Elective CholecystectomyCan Avoid Surgery if Asymptomatic or Minimally Symptomatic HIDA Showing EF 22% at 59 Minutes 1 References Case courtesy of Dr Matthew Lukies, Radiopaedia.org. From the case rID: 46882