RESUMO
INTRODUCTION: A major hepatic resection is currently defined as resection of 3 or more segments. The aim of this study was to analyse the post-operative morbidity and mortality of hepatic resections in relation to the number of segments excised. PATIENTS AND METHODS: From January 2000 to December 2010, 1111 liver resections were performed for colorectal liver metastases (CRLM). Data were collected from a prospectively maintained database and analysed according to the extent of resection performed. RESULTS: 457 patients had 1-2, 362 had 3-4 and 292 had 5-6 segments resected respectively. In comparing 1-4 vs. 5-6 segments, overall morbidity (16.7% vs 40.7%; p < 0.001), hepatic failure (0.6% vs 10.6%; p < 0.001); mean hospital stay (8 vs 13.5 days; p = 0.000), mean ICU stay (4.4 vs 6.5 days; p = 0.01), 60-day mortality (0.7% vs 3.4%; p = 0.002), and 90-day mortality (0.7% vs 3.4%; p = 0.002) were significantly different. When analysing the 3-4 vs 5-6 segment resections, morbidity (21.8% vs 40.7%; p < 0.001), hepatic failure (1.4% vs 10.6%; p = 0.000), 60-day mortality (0.7% vs 3.4%; p = 0.002), and 90-days mortality (0.8% vs 3.4%; p = 0.023) remained statistically significant. CONCLUSIONS: Differences in outcome would suggest a revision of the current classification. Only when 5 or more segments are excised for CRLM should a liver resection be considered "major".
