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Published May 25, 2014, 12:00 AM

John Puckropp and Dr. Farhan Khan

John Puckropp, left, had a cancerous tumor removed from his kidney by Dr. Farhan Khan, a urologist and director of the robotic surgery program at Essentia Health in Fargo, using “Firefly” flourescent imaging technology. Special to The Forum

Read the article: ‘Firefly’ dye guides kidney cancer surgery on Park Rapids man