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  • Title: Intraoperative microwave coagulation therapy for large hepatic tumors.
    Author: Ishikawa M, Ikeyama S, Sasaki K, Sasaki K, Miyauchi T, Fukuda Y, Miyake H, Harada M, Terashima Y, Yogita S, Tashiro S.
    Journal: J Hepatobiliary Pancreat Surg; 2000; 7(6):587-91. PubMed ID: 11180891.
    Abstract:
    We report new surgical techniques for intraoperative microwave coagulation therapy (IMCT), conducted in three patients with large liver neoplasms with poor liver function or difficult tumor location. Anterolateral thoracotomy was performed for tumors in the right lobe to obtain a good operative field. Four electrode needles were inserted for microwave irradiation, with settings of 60 W, 45 s for coagulation and 1 s for dissociation. Clamping of the hepatoduodenal ligament was performed during IMCT. We began the coagulation at the bottom of the tumor, irradiating the tumor and the surrounding parenchyma to create regional necrosis with a safe margin. With these methods, we treated two women diagnosed with large hepatocellular carcinoma with liver cirrhosis and a man with liver metastasis from rectal cancer. The postoperative course of these patients was uneventful. A marked low-density area was seen in the region of therapy and no enhanced findings were observed on enhanced computed tomography postoperatively. However, in one patient, transcatheter embolization (TAE) was performed 1 month postoperatively because recurrence was noted on the bottom of the tumor. Thus, IMCT destroys the peripheral part of the tumor that may remain viable after TAE, but combination therapy with TAE is preferable, especially when a viable part exists within tumors. IMCT is an active, safe, and nontoxic therapeutic modality for large hepatic tumors, and is particularly applicable in patients with large hepatocellular carcinomas and poor liver function.
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