(CBS/AP) CHAPEL HILL, N.C. - North Carolina coach Roy Williams is out of the hospital one day after surgery to remove a tumor from his right kidney.
School officials said the Hall of Fame coach checked out of UNC Hospitals on Thursday afternoon.
It remains unclear how much time the 62-year-old Williams will miss leading up to the start of preseason practice Oct. 13.
The school says doctors discovered the tumor during a physical earlier this month, and the coach underwent a 3½-hour procedure to remove it. The severity of that tumor is unknown, and team officials say test results could be back in about a week.
Williams might need another operation to remove another tumor from his left kidney.
He has led his alma mater to NCAA championships in 2005 and 2009.
Williams' surgery was first reported by CBS affiliate WRAL in Raleigh, N.C.
Williams told his players about his health situation in the locker room late Tuesday night, WRAL reported.
"It was heartbreaking for me," guard Dexter Strickland said. "I look at him as a father figure. I've been here for four years, so me and him have a great relationship together, and it was just heartbreaking to hear that he has those problems."