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An Alternative to Surgery for Kidney Cancer  
Patients with small kidney tumors sometimes require surgery, or nephrectomy, to remove malignant tissue. However, kidney tumor ablation offers a faster, easier alternative to surgery for some, allowing precise removal of the tumor while leaving as much of the kidney as possible.  

Kidney tumor ablation can help some patients avoid nephrectomy, the removal of a kidney. 

This minimally invasive procedure allows a radiologist to use imaging to apply extreme heat or cold to a tumor and destroy it instantly. Kidney tumor ablation is best for patients whose malignancy has not spread beyond the kidney and for whom surgery is not the best option for reasons of age or health condition. Most patients who undergo kidney tumor ablation return to normal activities in 24 hours.   
Meet Some Members of the Kidney Tumor Ablation Team 

Ronald Zagoria, MD

Dr. Zagoria is a globally recognized expert in kidney tumor ablation, having performed hundreds of procedures. He is a professor in residence and chief of the abdominal imaging section. 

Ryan Kohlbrenner, MD

Dr. Kohlbrenner is an assistant professor of clinical radiology. In addition to his expertise in kidney tumor ablation, he performs prostate artery embolization, a minimally-invasive treatment for benign prostatic hyperplasia. 


K. Palav Kolli, MD

Dr. Kolli is an assistant professor of clinical radiology. His areas of interest include the field of magnetic resonance guidance for interventional procedures, interventional oncology procedures, and venous interventions. 

Andrew Taylor, MD, PhD
Dr. Taylor is an assistant professor of clinical radiology. His areas of interest include the application of imaging oncology, particularly liver and kidney tumors. 
About Us 

The Department of Radiology and Biomedical Imaging at the 
University of California, San Francisco, is a leading health sciences center  focused on serving patients, conducting research,  and training the  next generation of radiologists. 

We are proud to have some of the foremost names in diagnostic, therapeutic, and interventional radiology developing promising new approaches to identify and treat disease. We are a patient-centered team, and are proud that the community recognizes us  for our compassion and care.

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It is our privilege and pleasure to work with you by providing world-class imaging services to your patients. We look forward to partnering with you to deliver the best possible patient outcomes. Please call our scheduling department at (415) 353-2573 or contact us anytime. 
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