Philadelphia defensive end Mike Patterson, who had a seizure at practice, has been diagnosed with a rain brain condition and his return to play is unknown. Patterson, 27, suffered a seizure during Wednesday's practice and was taken to a hospital. He was expected to leave the Lehigh, Pa., hospital for his home later Thursday.
Team trainer Rick Burkholder said Thursday examinations determined Patterson has a congenital brain condition called brain arteriovenous malformation, which was described as a tangle of blood vessels in the skull outside the brain.
"We're pretty sure that what caused the seizure wasn't football related," Burkholder said. "It just so happened to be at football practice. It could have happened at home, in the dorms, anywhere."
He said doctors are yet to determine a course of treatment.
"I'm not going to speculate whether Mike will return to football, this season or next season," Burkholder said. "It's foolish to speculate on that."
Patterson is in his seventh season with the Eagles, who made him a first-round draft choice in 2005. He played in 15 games last season, starting 14.
