Laparoscopic Microwave Coagulation Therapy for Hepatocellular Carcinoma

 

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Background and Study Aims: Several different effective forms of treatment are available, singly or in combination, for patients with hepatocellular carcinoma (HCC). These include surgical resection, transcatheter arterial embolization, percutaneous ethanol injection, and percutaneous microwave coagulation therapy. In this study, we carried out laparoscopic microwave coagulation therapy (LMCT), using laparoscopic microwave electrodes to treat HCC.

Patients and Methods: Under local anesthesia, 24 patients with HCCs located on or near the liver surface underwent LMCT under direct laparoscopic vision, with ultrasound guidance. LMCT was performed using microwave electrodes with tips ranging from 15 - 45 mm in length, and the effectiveness of the treatment was confirmed using contrast-enhanced computed tomography (CT) within two weeks of the LMCT procedure.

Results: The mean longest axis of the 26 HCC nodules in 24 patients was 20 mm, and that of the coagulated areas including the nodules was 40 mm, with additional therapy being required in two patients. Complete efficacy of the treatment was observed in 21 patients (87.5 %), but local recurrences were seen in three of them one year after LMCT. The three-year survival rate was 92 %, but the number of patients included in the study was small. Hemostasis was complete, but mild pneumothorax occurred in three patients.

Conclusions: LMCT under local anesthesia is a minimally invasive and effective therapy when carried out on a single occasion to treat HCCs located near the liver surface, and it can be safely performed under direct visual guidance.

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M.D. S. Seki

Third Dept. of Internal Medicine Osaka City University Medical School

1-4-3 Asahimach, Abenoku

Osaka 545-8585

Japan

Phone: +81-6-6645-3813

Email: s.seki@med.osaka-cu.ac.jp