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Prognostic Factors for Percutaneous Microwave Coagulation Therapy of Hepatic Metastases

Ping Liang1, Baowei Dong1, Xiaoling Yu1, Yanrong Yang2, Dejiang Yu1, Li Su1, Qiujin Xiao1 and Lin Sheng1

1 Department of Ultrasound, Chinese PLA General Hospital, 28 Fuxing Rd., Beijing, 100853 China.
2 Chinese PLA Medical Library, 5 Fengtai Rd., Beijing, 100039 China.



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  		Fig. 1A. —52-year-old man with rectal cancer. Contrast-enhanced multidetector (MDCT) scan obtained before microwave treatment shows 3.2 x 3.6 cm metastasis with peripheral enhancement (arrow) in segment VIII of liver.

 


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  		Fig. 1B. —52-year-old man with rectal cancer. Contrast-enhanced MDCT scan obtained 1 month after microwave ablation shows 5.2 x 6.0 cm zone of hypoattenuation without enhancement (arrow), suggestive of complete response.

 


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  		Fig. 2. —Graph shows 5-year cumulative survival rate of 74 patients with hepatic metastases who were treated with microwave ablation.

 


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  		Fig. 3. —Graph shows 5-year cumulative survival rate of 74 patients with hepatic metastases who were treated with microwave ablation. Data are stratified according to number of tumors: one nodule (thin solid line), two nodules (dashed line), three or more nodules (thick solid line).

 


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  		Fig. 4. —Graph shows 5-year cumulative survival rate of 74 patients with hepatic metastases who were treated with microwave ablation. Data are stratified according to diameter of tumor: <= 3 cm (thin solid line), > 3 to <= 5 cm (dashed line), > 5 cm (thick solid line).

 


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  		Fig. 5. —Graph shows 5-year cumulative survival rate of 74 patients with hepatic metastases who were treated with microwave ablation. Data are stratified according to histologic differentiation: well-differentiated tumor (thin solid line), moderately differentiated tumor (dashed line), poorly differentiated tumor (thick solid line).

 


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  		Fig. 6. —Graph shows 5-year cumulative survival rate of 74 patients with hepatic metastases who were treated with microwave ablation divided between those without intra- or extrahepatic metastases (thin line) and those with intra- or extrahepatic metastases (thick line).

 

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