title: Orbital amyloidosis.
abstract: A 51-year-old male presented with a chronic asymmetrical ptosis which was variable. Repeated anticholinesterase testing gave equivocal responses. The patient was treated for myasthenia gravis until a mass was detected in the orbit. Although rare, localized orbital amyloidosis should be considered in the diagnosis of patients with ptosis, particularly when the results of anticholinesterase testing are equivocal.
mesh_terms: D000686:Amyloidosis / Q000175:diagnosis* / Q000473:pathology; D001706:Biopsy; D001763:Blepharoptosis / Q000209:etiology; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D008875:Middle Aged; D009157:Myasthenia Gravis / Q000175:diagnosis; D009915:Orbit