<prompt> Not seen in carpal tunnel syndromePain of medial 3 fingersApe thumb deformitySymptoms worsen at nightSensory loss on lateral 312 of palm  <response>: 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 313 of palm. 