Policeman’s tip hand is seen in

ERB'S PARALYSIS:- upper plexus injury. Caused by forceful widening of the angle between the head and shoulder which may occur by traction of arm during the birth of a child or by fall on the shoulder. Involves upper trunk - C5, C6 roots. Leads to typical deformity in the limb- policeman's tip hand/ porter's tip hand. The arm hangs by the side, adducted and medially rotated, forearm is extended and pronated. 1. Adduction of arm due to deltoid paralysis. 2. Medial rotation of arm-paralysis of supraspinatus, infraspinatus and teres minor. 3. Extension of elbow- paralysis of biceps brachii 4. Pronation of forearm- paralysis of biceps brachi 5. Loss of sensation over outer aspect of arm due to C6 spinal nerve involvement.