<prompt> A 24- year old man falls on the ground when he is struck in the right temple by a baseball. While being driven to the hospital, he lapses into coma. On examination he is unresponsive with the dilated right pupil. Which of the following is the most impoant step in initial management?CraniotomyCT scan of the headX-ray of the skull and cervical spineDoppler ultrasound examination of the neck  <response>: Patient showing features such as coma with a dilated pupil after a lucid interval following a head injury is suffering from extradural hematoma. It is a neurosurgical emergency, as it will result in the death of the individual if the hematoma is not removed. Treatment of choice is urgent craniotomy. Ref: Bailey and Loves Sho Practice of Surgery, 24th Edition, Pages 597-8 