Medline ® Abstract for Reference 47
of 'Nonsurgical therapies for localized hepatocellular carcinoma: Radiofrequency ablation, percutaneous ethanol injection, thermal ablation, and cryoablation'
Risk factors for the local recurrence of hepatocellular carcinoma after a single session of percutaneous radiofrequency ablation.
Hori T, Nagata K, Hasuike S, Onaga M, Motoda M, Moriuchi A, Iwakiri H, Uto H, Kato J, Ido A, Hayashi K, Tsubouchi H
J Gastroenterol. 2003;38(10):977-81.
BACKGROUND: Radiofrequency ablation (RFA) is a new, minimally invasive treatment for hepatocellular carcinoma (HCC). However, there is little available information regarding local recurrence after a single session of RFA with a single electron insertion.
METHODS: From February 1999 to September 2001, we treated 104 HCC tumors with an expandable needle with four hooks. Ninety-nine of the 104 tumors were successfully treated by single-session RFA with a single electrode insertion. We investigated the relationships between pretreatment factors (tumor size, tumor staining, tumor capsule, and tumor location) and local recurrence in these 99 tumors.
RESULTS: The mean size of the 99 tumors was 21.5 mm in diameter (range, 10 to 33 mm). The overall local recurrence rates were 9.7%, 15.4%, and 20.4%, at 1, 2, and 3 years, respectively. For small tumors (smaller than 25 mm), the local recurrence rates at 1, 2, and 3 years were 4.0%, 8.0%, and 14.6%, respectively. The local recurrence rates were 21.1% and 32.3% at 1 and 2 years,respectively, for large tumors (25 mm or larger), and at 3 years the rate was over 50% for tumors located close to the liver surface. Tumor size and tumor location relative to the liver surface were significantly associated with a higher local recurrence rate. However, other variables tested showed no significant relationship to the local recurrence rate.
CONCLUSIONS: This study demonstrated that both tumor size and location relative to the liver surface influence the local efficacy of single-session RFA with a single electrode insertion.Radiofrequency ablation (RFA) is a new, minimally invasive treatment for hepatocellular carcinoma (HCC). However, there is little available information regarding local recurrence after a single session of RFA with a single electrode insertion.
Second Department of Internal Medicine, Miyazaki Medical College, 889-1692, Miyazaki, Kiyotake, Japan.