North Carolina says Roy Williams' second kidney tumor isn't cancerous.

The school announced the test results Thursday night, a day after the Hall of Fame men's basketball coach had a biopsy of the tumor discovered on his left kidney. The school says the tumor is the same kind of non-cancerous growth that was surgically removed from his right kidney on Sept. 19.

Dr. Eric Wallen, one of Williams' surgeons, said in a statement that the 62-year-old coach won't need surgery on the left kidney. Wallen said Williams should be ready for the start of preseason practice next week.

In a statement, Williams said his family was "overwhelmed" by messages of support from former players, fellow coaches and friends.