"Numb chin" as the first and sole presenting sign of multiple sclerosis

Abstract

Cranial nerve palsies are occasional clinical findings in multiple sclerosis. Sometimes, they are the presenting sign of multiple sclerosis. Facial numbness localized in the region of the distribution of the mental nerve has been labeled 'the numb chin syndrome'. Differential diagnosis in presentations such as these includes cancer that involves the mental nerve. Here we report a case of numb chin syndrome, a more limited form of trigeminal nerve involvement, as the first and sole presentation of multiple sclerosis.