Parrish said a pathology report indicated the tumor is benign and he will be back on the field with the team "in a couple of weeks."
"It was a shock," said Parrish, 26, who will move into San Francisco's starting lineup this year in place of departed strong safety Lance Schulters. "I went in knowing that I had a groin injury and then they told me that I had a tumor in my testicle. So it was one of those things where, of course, you are concerned. But I was very happy that it was caught early. It is one of those things that if my groin would have healed up after the season, I wouldn't have known until there was actually a problem. I feel blessed for that, and I was able to go ahead and get it taken care of."
The tumor was discovered earlier this month during an exploratory Magnetic Resonance Imaging exam to inspect a previous condition of osteitis pubis in Parrish's groin. Parrish had played with a nagging groin injury last year and the Niners wanted their medical staff to take a look at the injury.
"We have had other guys with osteitis pubis here, those are things that you have got to be on top of because they can be nagging," Niners coach Steve Mariucci said. "You would like to make them calm down in the offseason. It's a blessing in disguise, because (the tumor) was detected very early and he is going to be here to play some football very soon."
Parrish said doctors told him he could resume full practice in two weeks, and no follow up treatment will be needed for his condition. Parrish, who signed a four-year, $12.025 million contract with a $3 million signing bonus on April 2, has started every game of his NFL career since joining the Chicago Bears as their second-round draft pick in 1998.