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Pseudotumors after renal parenchymal sparing surgery
A V Kshirsagar1, P L Choyke, W M Linehan
1Urologic Oncology Branch, Department of Radiology, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA.
The Journal of Urology
|March 21, 1998
Summary
Renal pseudotumors are common after kidney-sparing surgery, appearing as enhancing lesions that resolve within 13 months. These findings are not residual or recurrent cancer.
Area of Science:
- Urology
- Radiology
- Oncology
Background:
- Renal parenchymal sparing surgery is used for kidney cancer.
- Postoperative imaging may show defects mimicking tumors.
- Renal pseudotumors can cause diagnostic confusion.
Observation:
- 32 patients underwent 46 surgeries for renal cancers.
- Thrombin-soaked gelatin sponge was used for hemostasis.
- Imaging studies were reviewed for pseudotumor characteristics.
Findings:
- 13 pseudotumors were identified in 9 patients (22% of operations).
- Pseudotumors showed round contours and contrast enhancement.
- Lesions resolved in a mean of 13 months, leaving scars.
Implications:
- Renal pseudotumors are a common, benign finding post-surgery.
- They should not be mistaken for residual or recurrent renal cell carcinoma.
- Understanding pseudotumor behavior aids in accurate diagnosis and patient management.