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http://dx.doi.org/10.3857/jkstro.2010.28.2.85

Hypofractionated Radiotherapy for Small-sized Hepatocellular Carcinoma as Salvage Therapy: Sustained Local Control and Safety  

Bae, Sun-Hyun (Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine)
Park, Hee-Chul (Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine)
Lim, Do-Hoon (Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine)
Lee, Jung-Ae (Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine)
Choi, Moon-Seok (Department of Internal Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine)
Lee, Joon-Hyoek (Department of Internal Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine)
Koh, Kwang-Cheol (Department of Internal Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine)
Paik, Seung-Woon (Department of Internal Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine)
Yoo, Byung-Chul (Department of Internal Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine)
Publication Information
Radiation Oncology Journal / v.28, no.2, 2010 , pp. 85-90 More about this Journal
Abstract
Purpose: To evaluate the rate of tumor response, local control, and treatment-related complications after hypofractionated radiotherapy for recurrent hepatocelluar carcinoma (HCC) less than 5 cm in size. Materials and Methods: Among the HCC patients who were treated by radiotherapy (RT) between 2006 and 2007 after the failure of previous treatment, a total of 12 patients were treated with hypofractionated RT. The criteria for hypofractionated RT was as follows: 1) HCC less than 5 cm, 2) HCC not adjacent to a critical organ, 3) HCC without portal vein tumor thrombosis, and 4) less than 15% of normal liver volume that irradiated 50% of the prescribed dose. Hypofractionated RT was performed with 50 Gy delivered in 10 fractions, at a rate of 5 fractions per week. The evaluation of tumor response was determined by CT scans performed at 3 months after the cessation of RT, followed by the evaluation of toxicity by Common Terminology Criteria for Adverse Events version 3.0. The median follow-up period after radiotherapy was 18 months. Results: A complete response (CR) was achieved in 5 of 12 lesions (41.7%) at CT performed at 3 months after the cessation, whereas the overall complete response was observed in 7 of 12 cases (58.3%). In-field local control rate was sustained in 83.3% of patients. All patients developed intra-hepatic metastases except for 2 patients. The overall survival rate was 90.0% at 1 year and 67.5% at 2 years, respectively. Three patients developed Grade 1 nausea during RT and 1 patient showed a progression of ascites after RT. There was no grade 3 or greater treatment-related toxicities. Conclusion: Hypofractionated RT for small-sized HCC as a salvage therapy showed a 58.3% CR rate and 83.3% of local control. Fifty Gy administered in 10 fractions of partial liver irradiation is considered as a tolerable dose that does not cause severe complications.
Keywords
Hepatocellular carcinoma; Radiation; Hypofractionation;
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