HALF PRICE OFFER ENDS TODAY! New Elbow X-ray Interpretation Course by Andrew Murphy REGISTER NOW

Couinaud classification of hepatic segments (mnemonic)

Pauli et al published a "handy" way to remember the Couinaud classification of hepatic segments 1.

Make a fist with your right hand. The fingers should be wrapped around the flexed thumb and the fist should face you. The segments are represented by the following:

  • segment 1: (caudate): the thumb, in the palm of the hand
  • segment 2: index finger proximal phalanx
  • segment 3: index finger middle phalanx
  • segment 4a: middle finger proximal phalanx
  • segment 4b: middle finger middle phalanx
  • segment 5: ring finger middle phalanx
  • segment 6: little finger middle phalanx
  • segment 7: little finger proximal phalanx
  • segment 8: ring finger proximal phalanx

The branches of the portal vein run in the plane of the interphalangeal joints.

The right, middle and left hepatic veins run in intersegmental planes represented by the plane of the interdigital spaces.

Anatomy: Abdominopelvic

Anatomy: Abdominopelvic

Article information

rID: 54331
Section: Mnemonics, Anatomy
Synonyms or Alternate Spellings:

ADVERTISEMENT: Supporters see fewer/no ads

Cases and figures

  • Figure 1: hand memory aid (photo)
    Drag here to reorder.
  • Figure 2: hand memory aid (photo)
    Drag here to reorder.
  • Figure 3: Couinaud liver segments
    Drag here to reorder.
  • Figure 4: annotated CT - axial
    Drag here to reorder.
  • Figure 5: annotated CT - coronal
    Drag here to reorder.
  • Updating… Please wait.

     Unable to process the form. Check for errors and try again.

     Thank you for updating your details.