05/19/2006 AT 10:00 AM EDT
Lynyrd Skynyrd frontman Johnny Van Zant underwent emergency surgery to have his appendix removed on Thursday, according to the band's manager.
Van Zant, 46, left the operating room at Stanford University Medical Center in Palo Alto, Calif., around 10 p.m. Thursday, manager Ross Schilling told the Associated Press.
"He had been feeling bad the past couple of days," Schilling said. "He had performances Tuesday and Wednesday and sucked it up last night as far as performing with some pain."
Information on Van Zant's condition was not available, but he is expected to need a week to recover from the surgery.
The band has cancelled three shows this weekend: Shoreline Amphitheater in Mountain View, Calif.; the U.S. Marine Corps base at Twenty-Nine Palms, Calif., and Sunset Station Casino in Henderson, Nev.
Van Zant will also miss next Tuesday's Academy of Country Music awards, where he and brother Donnie are up for duo of the year for their work performing as "Van Zant."