When Rory Kleinman, 42, sought medical attention for stomach issues in 2012, he had no idea that routine scans would reveal a more serious problem.

“What happened was they were looking for something specific to do with my stomach, and through an MRI they then a tiny spot that was on my kidney ” Kleinman told FoxNews.com.

That tiny spot on Kleinman’s kidney turned out to be a tumor.

For many years, renal tumors required partial or total removal of the kidney.But a new procedure called microwave ablation can be done without surgery.

“Microwave ablation is a technique used to heat tumors,” Dr. Aaron Fischman, assistant professor of radiology and surgery at Mount Sinai Hospital in New York City told FoxNews.com. “We're able to actually place a needle directly to the tumor and kill it without actually removing it or making an incision.”

Patients are put under conscious sedation while a microwave antenna is placed directly inside the tumor.

Microwave ablation is used to treat tumors in the liver, kidneys and lungs. Doctors at Mount Sinai have seen success rates of 90 to 95 percent in their.

For Kleinman, the ease of the procedure has made cancer a distant memory. In a few days later he was back at work.