4Chen J G, Zhang S W. Liver cancer epidemic in China: past, present and future [ J ]. Semin Cancer Biol, 2011, 21 ( 1 ) :59-69.
5Jemal A, Bray F, Center M M, et al. Global cancer sta- tistics[J]. CA Cancer J Clin, 2011,61 (2) :69-90.
6Senthilnathan S, Memon K, Lewandowski R J, et al. Ex- trahepatic metastases occur in a minority of hepatocellular carcinoma patients treated with locoregional therapies: analyzing patterns of progression in 285 patients[ J]. Hep- atology, 2012,55 ( 5 ) : 1432-1442.
7Lee H S. Management of patients with hepatocellular car- cinoma and extrahepatic metastasis [ J ]. Dig Dis, 2011,29 (37:333-338.
8LeungKW, LeungJLY, SyA NL, etal. Bone metas- tasis as the first presentation of hepatocellular carcinoma [J]. J HK Coil Radiol, 2010,12:113-116.
9He J, Zeng Z C, Tang Z Y, et al. Clinical features and prognostic factors in patients with bone metastases from hepatocellular carcinoma receiving external beam radio- therapy [ J 7. Cancer. 2009.115 ( 12 ) : 2710-2720.
