Computed Tomography Imaging Features and Changes in Hemostatic Agents After Laparoscopic Partial Nephrectomy.

Abstract Purpose: Urologists and radiologists should be aware of the CT scan appearance of laparoscopic partial nephrectomy (LPN) with the various hemostatic agents since they may confound the interpretation of these radiographic findings. We report the various postoperative CT scan appearance and changes after LPN. Materials and Methods: We reviewed CT scans retrospectively (within 3 months) of 86 patients who underwent LPN using various hemostatic agents between March 2008 and July 2014. We analyzed the CT findings after LPN, including postoperative changes, tumor recurrence, and complications. We also discuss changes in abnormal features, such as mass-like lesions and gas formation, on follow-up CT scans. Results: To categorize the postoperative changes, we classified them according to their specific CT findings: (1) a combination of perinephric stranding and postsurgical fluid collection (n = 46), (2) mass-like lesions (n = 35), (3) a parenchymal defect (n = 2), (4) local recurrence at the surgical si...