간세포암종 환자의 새로운 예후 지표 - Modified CLIP Score -
Modified CLIP Score as a New Prognostic Index for Patients with Hepatocellular Carcinoma
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목적: 간세포암종 환자의 예후는 잔존 간기능과 종양의 특성에 따라 좌우되는 것으로 알려져 있다. CLIP score는 종양 인자와 간기능 인자를 모두 포함하고 있는 병기체계로서 최근에 가장 흔히 사용되고 있다. 본 연구의 목적은 간세포암종 환자에 대한 새로운 예후의 지표로서 CLIP score의 일부를 변형시킨 modified CLIP score를 제안하고, 237명의 한국인 간세포암종 환자에 대해 CLIP score와 비교하여 각 병기에 대해 얼마나 예후를 잘 반영하는지를 알아보고자 하였다. 대상과 방법: 동아대학교병원에서 진단된 237명의 간세포암종 환자를 대상으로 후향적 조사를 하였다. 나이 및 성별, 간경변증 동반 여부, Child-Pugh stage, 종양 크기, AFP 수치, Okuda stage, CLIP score 및 Modified CLIP score 등을 조사하여 각각의 인자들과 원발성 간세포암종 환자의 예후 및 생존기간과의 상관관계를 알아보았다. 예후 분석은 각각의 변수들에 대해 Kaplan-Meier법으로 생존곡선을 계산하였고, log-rank test를 사용하였다. 결과: 환자의 평균 나이는 57.5세였고, 남자(79.7%)가 많았다. 214명(90.3%)의 환자가 간경변증을 동반하고 있었고, 70%의 환자가 B형간염을 가지고 있었다. 전체 평균 생존기간은 25.7개월이었고, 복수, 간문맥 혈전, AFP, 종양의 크기 및 형태, Child 병기와 의미 있는 상관관계가 있었다. CLIP score 0, 1, 2, 3 및 4-6의 환자군에 따른 평균 생존기간은 각각 41.0개월, 25.2개월, 13.8개월, 13.4개월 및 6.5개월이었다(P<0.001). Modified CLIP score 0, 1, 2, 3 및 4-6의 환자군에 따른 평균 생존기간은 각각 42.1개월, 34.0개월, 25.7개월, 14.0개월 및 6.8개월이었다(P<0.001). Kaplan Meier법에 의한 분석에 따르면, Modified CLIP score가 CLIP score에 비해 좀더 나은 예후 분별력을 가지는 것을 알 수 있었다. 결론: 간세포암종 환자의 생존기간은 CLIP score 및 Modified CLIP score와 의미 있는 상관관계가 있음을 알 수 있었다. 특히 2와 3점에 속하는 환자군에서 Modified CLIP score의 예후 분별력이 월등했고, 또한 각 병기별로 생존기간을 잘 구별하여 반영하였다. 하지만 4, 5, 6점에 속하는 환자군에서는 생존기간과 상관관계가 없어 각 병기별로 예후를 잘 반영하지 못함을 알 수 있었다.
Abstract
Backgrounds/Aims: The prognosis of cirrhotic patients with hepatocellular carcinoma (HCC) depends on both residual liver function and tumor characteristics. The aims of this study was to construct a new prognostic index for HCC patients: the modified CLIP score, and to compare its discriminatory ability and predictive power with those of the CLIP score that is currently the most commonly used integrated staging score in patients of HCC. Methods: A retrospective analysis of 237 cases of HCC diagnosed at Dong-A university hospital was performed. Prognostic analysis was performed for single variables by estimating survival distributions with the Kaplan-Meier’s method, and statistically compared by the log-rank test. Results: Patients had a mean age of 57.5 years and were predominantly males (79.7%). The overall median survival period was 25.7 months. It was correlated to ascites, portal vein thrombosis, AFP, tumor size, and Child-Pugh classification. The median survival period was 41.0, 25.2, 13.8, 13.4, and 6.5 months for CLIP scores 0, 1, 2, 3, and 4 to 6, respectively (P<0.001), and 42.1, 34.0, 25.7, 14.0, and 6.8 months for modified CLIP scores 0, 1, 2, 3, and 4 to 6, respectively (P<0.001). The Kaplan-Meier’s curve showed that the modified CLIP score had additional explanatory power above that of the CLIP score. Conclusions: The modified CLIP score, compared with the CLIP score, particularly in the score 2- to 3- patient groups of HCC, had greater discriminant ability and survival predictive power, but was not able to discriminate 4- to 6- patient group.
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