Cancer - Kidney(구연) Oral Session 7 / Cancer - Kidney (Ⅰ) (O-071) Rm.201 10월 30일(수) 16:00-17:00 부분 신장절제술 후 신장 기능을 예측하는 새로운 방법: 3D Printing 소프트웨어를 이용한 신장 종양 접촉 표면적 울산대학교 서울아산병원 임범진,이원철,경윤수,유달산,송채린,정인갑,홍범식,홍준혁,안한종,김청수 Objective: The renal tumor contact surface area has been recently proposed to predict perioperative outcomes, especially renal function in patients who underwent partial nephrectomy. However, the renal tumor contact surface was measured in an inaccurate way by a complex equation. Therefore, we develop the program to obtain a more accurate rapid renal tumor contact surface. Methods: Patients underwent DTPA renal scan before and after partial nephrectomy for renal tumors. Pre-operative CT scans are used to distinguish renal mass form normal kidney, and then the contact surface area is calculated using software (Materialise 3-matics) to calculate CSA for each tumor (figure1). Linear regression analysis for between Contact Surface Area and prediction of GFR changes in DTPA renal scan after partial nephrectomy. Results: 96 patients were analyzed. The median tumor size was 2.3cm (range 1.0-4.5). It was found that the proposed method is useful for predicting 30% reduction in renal function of surgical site. Contact Surface Area (0.811) had a significantly larger AUC than Renal Score (0.686, P =0.001) Conclusions: In patients undergoing partial nephrectomy, tumors with greater contact surface area with surrounding renal parenchyma require a more extensive resection, thus impacting on postoperative renal function. Therefore, this method will be able to predict the post-operative kidney function. keywords : Renal cell carcinoma, contact surface, renal fuction