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: Anatomy
Not seen in carpal tunnel syndrome 
Select and explain. 
A. Pain of medial 3 fingers, B. Ape thumb deformity, C. Symptoms worsen at night, D. Sensory loss on lateral 3½  of palm
D: Sensory loss on lateral 3½  of palm
Answer: D: Sensory loss on lateral 3½  of palm 
Explanation: Carpal tunnel syndrome is compression of medial nerve below flexor retinacalum. Palmar cutaneous branch is given before median nerve pierces below flexor retinacalum and hence no loss of sensation on lateral 3⅓ of palm.