03/03/2008 at 05:00 PM EST
Van Halen have postponed four concerts while guitarist Eddie Van Halen
undergoes medical treatment, the band announced Monday.
"The Van Halen concerts in Dallas, Cincinnati, Raleigh, and Baltimore have
been postponed," says a new message on the band's Web site
. "According to
Eddie Van Halen's physician, he is undergoing a battery of comprehensive
medical tests to determine a defined diagnosis and recommended medical
On Sunday TMZ.com
posted a YouTube video
of him playing onstage during a Feb. 20 concert and speculated about his performance during their song "Jump." But fans commenting on the clip were divided about whether there was actually anything wrong with the performance at all.
In 2002, Eddie Van Halen announced
he was cancer-free after a year of battling the disease.
The band's postponed shows have been rescheduled for April.