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Objective: Transumbilical single incision surgery(TSIS)has recently gained popularity for symptomatic renal cysts.We evaluated the clinical utility and safety of homemade glove port device in bilateral renal cyst decortication patients at our institution.Methods: We reviewed our series of 42 bilateral symptomatic renal cyst(range,4-12 cm)decortication performed from November 2010 to December 2013.A homemade port device consisted of two control loops and a glove to form three channels was placed through the umbilical single incision.A homemade single port device was made by fixing a size 7 1/2 surgical glove to the retractor outer ring and securing the glove fingers to the end of 3 trocars with a tie.The homemade port was inserted at the umbilical incision;operation was performed by using a special flexible 30-degree laparoscope and conventional laparoscopic instruments.Results: All cases were completed successfully,without conversion to a standard laparoscopic or open approach.The average operative time was 75 min and the estimated blood loss was less than 30 mL,no intraoperative complication occurred.The mean hospital stay was 2.8±1.5(range,2-5)days,with a median follow-up of 20(range,8-32)months,there was no recurrence.Conclusions: Our homemade single port device is costeffective and more flexible to deal with bilateral renal cysts especially ventral lesions than the current multichannel port or traditional laparoscopic surgery.