=====Biliary Disease=====
====Cholelithiasis====
  *80% = cholesterol as major component
  *pain usually poorly localised
  *no systemic signs/symptoms
  *lab Ix - normal
  *USS preferred imaging modality, MRI if stone is thought to be in the duct (choledocholithiasis)

====Cholecystitis====
  *well localised pain
  *often with guarding, rebound tenderness, peritonism, fever, systemic signs
  *up to 1/3 do not have leukocytosis

====Cholangitis====


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**References include:**\\ 
[[https://emedicine.medscape.com/article/175667-overview|EMed cholelithiasis]]\\ 
https://www.bsg.org.uk/clinical-resource/gallstone-disease-diagnosis-and-management/\\