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Related Experiment Videos

A new method for mapping hepatic subsegment: counterstaining identification technique.

T Takayama1, M Makuuchi, K Watanabe

  • 1Department of Surgery, National Cancer Center Hospital, Tokyo, Japan.

Surgery
|February 1, 1991
PubMed
Summary

A novel counterstaining technique aids surgeons in precisely resecting liver subsegments for hepatocellular carcinoma. This method enhances surgical precision, especially after preoperative embolization, improving outcomes for liver cancer patients.

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Area of Science:

  • Hepatobiliary Surgery
  • Surgical Oncology
  • Interventional Radiology

Background:

  • Hepatic subsegmentectomy for hepatocellular carcinoma (HCC) typically relies on portal vein dye injection to delineate tumor margins.
  • Preoperative hepatic arterial and portal venous embolizations are sometimes used as adjuvant therapy for HCC in cirrhotic patients.
  • Identifying precise resection borders can be challenging in patients with altered liver anatomy or vascularization.

Observation:

  • A new technique uses sequential ultrasonic-guided staining of adjacent portal units to identify the target subsegment.
  • The non-staining avascular area is defined as the subsegment for resection.
  • This counterstaining method visualizes the avascular subsegment for complete resection.

Findings:

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  • The described counterstaining technique enables precise identification and total resection of the targeted hepatic subsegment.
  • This method is particularly effective in patients who have undergone preoperative hepatic arterial and portal venous embolizations.
  • The technique is also applicable in cases where standard dye injection is hindered by arterioportal shunting or portal tumor thrombus.

    • Implications:

    • This approach offers a reliable alternative for hepatic subsegmentectomy, enhancing surgical accuracy in complex HCC cases.
    • It provides a viable solution for identifying resection margins when conventional methods are compromised.
    • The technique has the potential to improve surgical planning and outcomes for liver cancer patients undergoing subsegmentectomy.