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Laparoscopic Anatomical Liver Segment VII Resection with Liver Parenchymal Transection Following a Priority Approach

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Horizontal liver cleft: a rare anatomic variant.

Yong Han Ting¹, Kian Soon Lim¹

¹Department of Diagnostic Radiology, Tan Tock Seng Hospital, Singapore, Singapore.

The American Journal of Case Reports

|September 21, 2014

Summary

This summary is machine-generated.

A rare horizontal liver cleft, potentially from abnormal embryological development, was identified on CT scans. This anomaly challenges standard liver segmentation methods crucial for hepatobiliary surgery.

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Area of Science:

Radiology
Hepatobiliary Surgery
Embryology

Background:

Accurate preoperative radiological assessment of liver segments is vital for advanced hepatobiliary surgical techniques like segmental resection.
Conventional liver segmentation relies on imaginary planes along portal and hepatic veins.

Observation:

A 74-year-old female patient presented with a unique horizontal cleft dividing the liver into superior and inferior segments.
This cleft, observed on contrast-enhanced CT, contained the main portal veins and was present on prior imaging without history of liver surgery.

Findings:

This case represents the first reported instance of a horizontal liver cleft anomaly.
The anomaly is hypothesized to result from an early cessation of liver embryological development.

Implications:

The presence of a horizontal liver cleft can complicate standard liver segmentation techniques, such as Couinaud's classification.
Awareness of such anatomical variations is crucial for surgical planning and accurate radiological interpretation in hepatobiliary procedures.