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Single-incision laparoscopic surgery (SILS) aims to reduce the number and size of skin incisions. The authors compared systemic stress and perioperative outcome of SILS and laparoscopic (LAP) cholecystectomy. Twenty-nine subjects (8 males and 21 females; mean age = 47 years; mean body mass index = 27) were included in the study. There was no statistical difference in mean operative time (LAP = 89 minutes; SILS = 113 minutes; P = ns), and no intraoperative complications were reported. There were no statistically significant differences observed in white cell count, C-reactive protein, interleukin-6, and tumor necrosis factor-α between SILS and LAP groups. The mean hospital length of stay (LAP = 1.8 days; SILS = 1.4 days) and Visual Analogue Scale scores for pain at 6 hours (LAP = 5.14; SILS = 4.46) and 24 hours (LAP = 3.9; SILS = 2.815) were similar with no perioperative morbidity. These results …