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Hepatic grooves and portal segmentation.

M L Ono¹, G Murakami, T J Sato

¹Department of Anatomy, Sapporo Medical University School of Medicine, South 1 West 17, Sapporo 060-8556, Japan.

Kaibogaku Zasshi. Journal of Anatomy

|February 24, 2001

Summary

Grooves on the liver surface are not reliable indicators of Couinaud

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Area of Science:

Anatomy
Surgical Anatomy
Hepatic Surgery

Background:

Accurate identification of liver segments is crucial for surgical planning and execution.
Couinaud's classification provides a standardized method for liver segmentation based on vascular anatomy.
The topographical relationship between external liver features and segmental borders requires further elucidation.

Purpose of the Study:

To investigate the anatomical relationship between diaphragmatic grooves and Couinaud's portal segments.
To determine if grooves serve as reliable landmarks for identifying liver segmental borders.

Main Methods:

Macroscopic examination of 50 human livers from 420 cadavers.
Identification and mapping of 79 grooves on the diaphragmatic liver surfaces.
Correlation of groove locations with Couinaud's segmental borders (segments VIII, IV, and VII).

Main Results:

The majority of grooves (70/79) were located within segment VIII, either wholly or partially.
Only 11 grooves were identified at the border between two segments (VIII/IV or VIII/VII).
Diaphragmatic indentations into grooves were a rare finding (1 case).

Conclusions:

Diaphragmatic grooves are not consistently located at the borders of Couinaud's liver segments.
Grooves likely form later in development, post-segmentalization, due to diaphragmatic growth.
These grooves are not reliable anatomical landmarks for surgical navigation of liver segments.

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