<prompt> Most common complication of interochantric fracture femur is-MalunionNonunionOsteoahritisNerve injury  <response>: Malunion is the most common complication of IT fracture. Complications Malunion: Coxa varus: Caused by uncorrected abduction deformity, nail entry point that is too lateral, and migration of hardware proximally in the femoral head and neck Shoening: Due to uncorrected shoening intraoperatively and premature dynamization. Rotational deformity: Do to uncorrected external rotation of proximal fragment. This can be assessed intraoperatively with visualization of the lesser trochanter Ref: Adams outline of fracture 12the p.237 