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Laparoscopic adrenalectomy offers distinct benefits to patients and has now become the gold standard for the removal of adrenal lesions. Nonetheless, the procedure poses a challenge for surgeons in regards to the maneuverability of instruments, the two-dimensional operating field and the counterintuitive movements. This study reports our experience using the Zeus robotic surgical system in laparoscopic adrenalectomy compared with traditional laparoscopic adrenalectomy. From January 2003 to February 2005, a total of 12 patients were prospectively enrolled to receive robot-assisted laparoscopic adrenalectomy (RALA) or traditional laparoscopic adrenalectomy (TLA). The time necessary for robotic setup and operation was recorded, as well as complications, technical problems, postoperative hospital stay, morbidity, and mortality. Five RALA procedures and seven TLA were successfully completed. There was no significant difference between the groups in terms of age, body mass index, and tumor size. Resection times were longer in the RALA group (168.0 ± 30.7 min vs. 131.4 ± 29.0 min, p = 0.05). There were no perioperative complications. There was neither postoperative mortality nor morbidity at the time of discharge and during one year follow-up. RALA is as safe and technically feasible as TLA, It provides a real benefit for the surgeon with the three dimensional view, a comfortable sitting position, the elimination of the surgeon’s tremor, and increased degrees of freedom of the operative instruments compared with TLA. However, patient outcomes and operative costs should be evaluated further. [ABSTRACT FROM AUTHOR]