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
[{'content': 'Tardy ulnar nerve palsy is commonly seen in: September 2008 \nSelect and explain. \nA. Cubitus varus deformity, B. Cubitus valgus deformity, C. Dinner fork deformity, D. Garden spade deformity', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. B: Cubitus Valgus Deformity A Shallow ulnar groove predisposes to ulnar nerve injury. Inadequate fibrous arch or recurrent subluxation of ulnar nerve can lead to 'Tardy ulnar nerve palsy'. Progressive deformity of cubitus valgus may precipitate this condition. The nerve may be compressed if the fascial roof formed by flexor carpi ulnaris gets tightened resulting in numbness in the little finger and ulnar half of ring finger. There is motor weakness of intrinsic muscles of the hand supplied by ulnar nerve. The surgical treatment for this condition may be: Decompression of cubital tunnel, and/or Anterior transposition of ulnar nerve, or Medial epicondylectomy", 'role': 'assistant'}]