What happened to Curley's hand after he beat up Lennie?

Lenny crushed Curley's hand.

Curley sat down on the floor, looking in wonder at his crushed hand. Slim and Carlson bent over him. Then Slim straightened up and regarded Lennie with horror. “We got to get him in to a doctor,” he said. “Looks to me like ever’ bone in his han’ is bust.”