Mirizzi syndrome – stone impacted in Hartmann’s causes adherence to CBD, loss of Calot’s triangle.

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Type 1 - External compression
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Type II - <1/3 bile duct
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Type III – 1/3 – 2/3 bile duct
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Type IV >2/3 bile duct
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Type I
- Subtotal cholecystectomy
- Leave posterior wall where it is adherent to bile duct
- Ligate cystic duct if identified and still patent
- If not found, drain left in gallbladder fossa.
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Type II-IV
- Presence of fistula due to erosion of impacted gallstone in Hartmann’s pouch.
- CBD reconstruction with Roux-en-Y hepaticojejunostomy