CLEVELAND - Brad Kaster donated a kidney to his father this week, and he barely has a scar to show for it.

The kidney was removed through a single incision in his bellybutton, a surgical procedure Cleveland Clinic doctors say will reduce recovery time and leave almost no scarring.

"The actual incision point on me is so tiny I'm not getting any pain from it," Kaster, 29, said Wednesday. "I can't even see it."

Kaster was the 10th donor to undergo the procedure at the Cleveland Clinic. Dr. Inderbir S. Gill and colleagues at the research hospital on Thursday were to perform the 11th such procedure, which Gill said could make kidney donations more palatable by sharply reducing recovery time.

More than 80,000 Americans are awaiting kidney transplants. Last year, there were about 13,300 kidney donors in the U.S., and about 45 percent were living donors, according to the Organ Procurement and Transplantation Network.

The first 10 recipients and donors whose transplants used the single-incision navel procedure have done well, according to the researchers. They report on the first four patients in the August issue of the Journal of Urology.

Preliminary data from the first nine donors who had the bellybutton procedure showed they recovered in about just under a month, while donors who underwent the standard laparoscopic procedure with four to six "key hole" incisions took just longer than three months to recover.

The clinic says the return to work time for single-point donors is about 17 days, versus 51 for traditional multi-incision laparoscopic procedure.