This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
All the following can lead to damage of the axillary nerve except: 
Select and explain. 
A. Fracture of surgical neck of humerus, B. Intramuscular injection, C. Improper use of crutches, D. Shoulder dislocation
C: Improper use of crutches
Answer: C: Improper use of crutches 
Explanation: Ans: C. Improper use of crutches(Ref Apley's* 9/c p282)Improper use of crutches causes radial nerve palsy mostly rather than axillaty nerve injury.Radial Nerve Injury:Very high lesions may be caused by trauma or operations around the shoulder.Due to chronic compression in the axilla.Seen in drink & drug addicts who fall into a stupor with the arm dangling over the back of a chair - Saturday night palsy.In thin elderly patients using crutches - Crutch palsy.Weakness of wrist & hand.Paralysed triceps.Absent triceps reflex.