title: Lid retraction in myasthenia gravis.
abstract: Four of 150 patients with myasthenia gravis had upper lid retraction. Only two had apparent ptosis in the contralateral eye. Three patients developed this paradoxical sign during medical treatment and after thymectomy. Hering's law of equal innervation does not adequately explain this phenomenon, and the possibility of cholinergic overstimulation in neuromuscular transmission is raised.
mesh_terms: D000293:Adolescent; D000328:Adult; D001763:Blepharoptosis / Q000175:diagnosis; D005141:Eyelid Diseases / Q000175:diagnosis*; D005260:Female; D006801:Humans; D008297:Male; D009157:Myasthenia Gravis / Q000175:diagnosis*; D009886:Ophthalmoplegia / Q000175:diagnosis