AIM:To evaluate the value of right trisectionectomy,previously named right trisegmentectomy,in the treatmentof primary liver cancer by summarizing our 13-yearexperience for this procedure.METHODS:Thirty three primary liver cancer patientsundergoing right trisectionectomy from Apr.1987 to Dec.1999 were investigated retrospectively.The impacts insurvival of patients by cancerous biological behavior,suchas tumor thrornbi and satellite nodules,were discussedrespectively.All right trisectionectomies were performedunder normothermic interruption of porta hepatis at singletime.Ultrasonic dissector(CUSA system 200)was used indissection of hepatic parenchyma from Nov.1992,insteadof finger fracture.RESULTS:1-,3- and 5-year survival rates were 71.9 %,40.6%and 34.4 %,respectively.The longest survival termwith free cancer was 150 months(alive).There were nosignificant differences in survival curves between cases withand without tumor thrornbi(right branch of portal vein)andsatellite nodules.Operative mortality was 3.0 %(1/33).Mainsurgical complications occurred in 5 cases.CONCLUSION:Right trisectionectomy should be regardedas an effective and safe procedure for huge primary livercancers and is worth using more widely. AIM: To evaluate the value of right trisectionectomy, previously named right trisegmentectomy, in the treatment of primary liver cancer by summarizing our 13-yearexperience for this procedure. METHODS: Thirty three primary liver cancer patients undergoing right trisectionectomy from Apr.1987 to Dec.1999 were investigated retrospective. The factors insurvival of patients by cancerous biological behavior, suchas tumor thrornbi and satellite nodules, were discussed separately. All right trisectionectomies were performedunder normothermic interruption of porta hepatis at singletime. Ultrasound dissector (CUSA system 200) was used indissection of hepatic parenchyma from Nov.1992, insteadof finger fracture .RESULTS: 1-, 3- and 5-year survival rates were 71.9%, 40.6% and 34.4%, respectively.The longest survival term with free cancer was 150 months (alive) .There were nosignificant differences in survival curves between cases withand without tumor thrornbi (right branch of portal vein) andsatellite nodules. Operati ve mortality was 3.0% (1/33). Mainurgical complications occurred in 5 cases. CONCLUSION: Right trisectionectomy should be considered as an effective and safe procedure for huge primary liver cancer and is worth using more widely.