Myasthenia gravis (MG) is an autoimmune disorder affecting the neuromuscular junction. While 15% of MG patients present only ocular symptoms, others involve facial, bulbar, trunk, and limb muscles, which typically show circadian variation. 1 MG patients rarely develop isolated facial and bulbar weakness, 2 and thus, MG can resemble other diseases which cause cranial nerve palsy. Skull base tumors can develop unilateral cranial nerve palsies, called Garcin's syndrome, 3 which is not a usual presentation of MG. Herein, we report a unique case of MG mimicking Garcin's syndrome.