<prompt> Fracture of base of first metacarpal joint without dislocation is called?BennettRolandoJonesBoxers  <response>: The Rolando fracture is a comminuted intra-aicular fracture through the base of the first metacarpal bone. This is a fracture consisting of 3 distinct fragments; it is typically T- or Y-shaped. OTHER OPTIONS: Bennett fracture- fracture of base of 1st MC extending into CMC joint usually very unstable due to pull of Abductor pollicis longus Jones fracture- fracture of base of 5th MT Boxers Fracture- fracture 5th MC 