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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

'Firefly' dye guides kidney cancer surgery on Park Rapids man

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FARGO - John Puckropp felt a dull pain in his left side and immediately suspected a return bout of kidney stones.

After landing the passenger jet he piloted from the Twin Cities to Sheridan, Wyo., he decided to head to a hospital emergency room.


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Patrick Springer
Patrick Springer first joined the reporting staff of The Forum in 1985. He can be reached by calling 701-241-5522. Have a comment to share about a story? Letters to the editor should include author’s name, address and phone number. Generally, letters should be no longer than 250 words. All letters are subject to editing. Send to