Sam Maydew said the 73-year-old actor, who recently wrapped shooting the second season of the Starz drama Crash, is being treated at the University of Southern California. Hopper has canceled all travel plans to focus on his treatment.
"We're hoping for the best," Maydew said.
Hopper's health was in the headlines last month when he was hospitalized in New York for flulike symptoms and a stomach ailment and was forced to back out of a number of TV appearances. He checked out of the hospital the next day after being treated for dehydration.