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Annals of Oncology 15:775-780, 2004
© 2004 European Society for Medical Oncology

Original Paper

Induction of complete tumor necrosis may reduce intrahepatic metastasis and prolong survival in patients with hepatocellular carcinoma undergoing locoregional therapy: a prospective study

Received 21 November 2003; revised 19 January 2004; accepted 21 January 2004

Background:

Transarterial chemoembolization (TACE) and percutaneous acetic acid injection (PAI) are effective locoregional therapies for hepatocellular carcinoma (HCC). This study aimed to investigate whether HCC patients who had initial complete response to these treatments had a subsequent lower risk of intrahepatic metastasis.

Patients and methods:

A total of 152 patients who underwent locoregional therapy (94 received PAI and 58 received both TACE and PAI) for HCC (tumor size ≤5 cm) were prospectively evaluated.

Results:

In all, 60 (39%) patients had a complete tumor necrosis after treatment. The cumulative incidence of the development of intrahepatic metastasis was lower for patients with complete remission (P = 0.005) and for patients with smaller (≤3 cm) tumor size (P = 0.083). Cox multivariate survival analysis showed that absence of complete remission [relative risk (RR) 2.7; 95% confidence interval (CI) 1.4–5.3; P = 0.003] was the only independent factor that predicted the occurrence of intrahepatic metastasis. Patients with complete remission had a significantly better long-term survival than those without (P = 0.002), and the occurrence of intrahepatic metastasis over time independently predicted a decreased survival (RR 3.2; 95% CI 2.0–6.1; P = 0.019).

Conclusions:

Induction of complete tumor necrosis in HCC patients undergoing locoregional therapy may decrease the risk of intrahepatic metastasis and improve survival.

T.-I. Huo1,2,*, Y.-H. Huang1,2, J.-C. Wu1,2, P.-C. Lee1, F.-Y. Chang1,2 and S.-D. Lee1,2

1 Taipei Veterans General Hospital, Division of Gastroenterology, Department of Medicine, Taipei, Taiwan; 2 National Yang-Ming University School of Medicine, Faculty of Medicine, Taipei, Taiwan, Republic of China

Key words: arterial embolization, hepatocellular carcinoma, liver cirrhosis, metastasis, percutaneous acetic acid injection


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