What is the eponymous name for this injury?
Bennett's fracture - two-piece intra-articular fracture of the proximal first metacarpal.
What is a Rolando fracture?
Similar to a Bennett's fracture but there is increased comminution (i.e. three or more piece fracture).
Bennett's fracture base of first metacarpal, oblique fracture fragment, with fracture line extending into the articular bone.