간세포암종 환자의 5년 생존율 - 단일기관의 904명 코호트 연구
Five-year Survival Analysis of a Cohort of Hepatocellular Carcinoma Patients Who Treated at the National Cancer Center, Korea
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목적: 간세포암종은 국내 암 발생 등록분율 3위를 차지하고 예후 또한 매우 불량한 암종으로, 현재까지 국내 간세포암종 코호트를 대상으로 한 5년 생존율 보고는 없는 실정이다. 이에 연구자들은 국내 단일 기관에서 진단 및 치료된 간세포암종 코호트에서 병기, 간기능 및 치료법에 따른 5년 생존율을 구하고 예후인자를 조사하였다. 대상과 방법: 2000년 11월부터 2003년 12월까지 국립암센터에서 간세포암종으로 진단 및 치료받은 904명을 2007년 2월까지 추적하여, 간기능과 병기, 치료법에 따른 생존율을 구하고, 예후인자를 조사하였다. 결과: 904명의 평균 연령은 56세였고 남자가 80.9%였다. 전체 환자의 1년, 3년, 5년 생존율은 각각 54.0%, 31.3%, 23.9%였으며, modified 5th UICC 병기에 따른 5년 생존율은 I, II, III, IVa에서 각각 61.2%, 54.4%, 18.4%, 4.1%였으며, IVb군의 중앙생존기간은 3.7개월에 불과하였다. Modified 5th UICC 병기 I, II군과 IVa, IVb군 간에 생존율의 차이가 없었다. Child-Pugh 분류의 각 등급간에는 뚜렷한 생존율의 차이가 있었다. Modified 5th UICC 병기 I,II군에서 Child-Pugh 분류 A등급인 경우 수술 절제술군과 경동맥화학색전술군 사이에 5년 생존율의 차이가 있었으며(80.1% vs 52.8%, p<.001), III군에서 더욱 큰 차이를 보였다(60.7% vs 17.0%, p< .001). Child-Pugh 분류 A등급인 경우 병기 IVa군에서 경동맥화학색전술군은 전신항암화학요법군에 비해 생존율이 높았으나(중앙생존기간 6.9 vs 4.0개월, p<.001), 병기 IVb군에서는 경동맥화학색전술, 전신항암화학요법, 방사선치료군 간에 생존율의 차이가 없고(중앙생존기간 각각 8.6, 6.2, 6.5개월) 보존 치료군(중앙생존기간 2.6개월)에 비해 세 치료군 모두 유의하게 생존율이 높았다. 간세포암종 환자의 예후에 영향을 미치는 독립적 예후인자는 Child-Pugh 분류, modified 5th UICC 병기 분류, 문맥혈전증 여부 및 혈청 알파태아단백치로 3년 생존 분석 결과와 같았고, 여기에 종양 형태와 내원 당시 증상이 포함되었다. 결론: 국내 단일기관의 간세포암종 코호트의 5년 생존율과 독립적 예후인자를 처음으로 구하였다.
Abstract
Background/Aims: We investigated the five-year survival outcomes of a large cohort of hepatocellular carcinoma (HCC) patients who were treated at a single institute, and this is a follow-up study of a previous report. Methods: Nine hundred four HCC patients who were treated at the National Cancer Center Korea were enrolled and they were followed till February 2007. Results: The mean age of the patients was 56.0 years and 731 patients were male. Six hundred seventy-seven (74.9%) patients died and the overall 5-year survival rate (5-YSR) was 23.9%. The 5-YSRs of the patients with modified UICC stage I, II and III were 61.2%, 54.4% and 18.4%, respectively, and the median survival time was 4.3 and 3.7 months for the stage IVa and IVb patients, respectively. For the analysis of the treatment modality, surgical resection showed significantly better outcomes for the five-year survival as compared with transcatheter arterial chemoembolization (TACE) for Child-Pugh A patients with modified UICC stage I or II disease (80.1% vs 52.8%, respectively, P<.001), or stage III disease (60.7% vs 17.0%, respectively, P<.001). For patients with advanced stage IVb disease, TACE, systemic chemotherapy and radiotherapy increased the median survival period more than conservative management for the Child-Pugh class A patients. The serum alpha-fetoprotein level, portal vein tumor thrombosis, the Child-Pugh class, the tumor stage, the tumor type and symptoms were related to the prognosis. Conclusions: This study presented, for the first time, the 5-YSRs of a cohort of HCC patients.
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