Gallbladder duplication

Gallbladder duplication is a rare anatomic anomaly characterised by the presence of an accessory gallbladder. There is no increased risk for malignancy or calculi compared to a single gallbladder.

Prevalence is estimated at 1 in 3000. 

Boyden's classification divides gallbladder duplication into three groups:

  • bilobed, incomplete gallbladder division with one common cystic duct
  • complete gallbladder duplication with separate cystic ducts that lead to a common hepatic duct
  • complete gallbladder duplication with a common cystic duct entering the common hepatic duct

Its classification is more easily applied today using MRI, since ultrasound does not always allow adequate visualization of the cystic duct.

Imaging differential considerations include:

Abdominal and pelvic anatomy
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Article information

rID: 22597
Section: Anatomy
Tags: refs, variant
Synonyms or Alternate Spellings:
  • Duplication of gallbladder
  • Duplication of the gallbladder

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Cases and figures

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     Case 1
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    Bilobed gall blad...
    Case 2: bilobed gall bladder
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    Case 3
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