title: [Ice pack test in the diagnosis of myasthenia gravis].
abstract: To demonstrate the sensitivity and the specificity of the ice test in the differential diagnosis of ptosis in myasthenia gravis.
  
  
  
  Prospective trial with a control group. The patients were instructed to hold a frozen ice pack on the closed ptotic eyelid. They were divided into 2 groups, with group I consisting of patients with myasthenia gravis and group II (control) consisting of patients with congenital, non-myasthenic myogenic or aponeurotic ptosis.
  
  
  
  All patients in group I had increased palpebral fissure for at least 3 mm after the application of ice pack. No patient in group II showed increased palpebral fissure after the ice test.
  
  
  
  Ice test proved to be specific for the detection of myasthenic ptosis.
authors.affiliation: setores de Plástica Ocular e Orbita, Disciplina de Oftalmologia, Faculdade de Medicina do ABC, Santo André, SP, Brasil. lopesdafonseca@uol.com.br
authors.forename: Nilson Lopes da
authors.initials: NL
authors.lastname: Fonseca
authors.forename: Lucia Miriam Dumont
authors.initials: LM
authors.lastname: Lucci
authors.forename: José Ricardo Carvalho Lima
authors.initials: JR
authors.lastname: Rehder
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001763:Blepharoptosis / Q000209:etiology*; D016022:Case-Control Studies; D003080:Cold Temperature; D003937:Diagnosis, Differential; D003941:Diagnostic Techniques, Ophthalmological; D005260:Female; D006801:Humans; D007053:Ice; D008297:Male; D008875:Middle Aged; D009157:Myasthenia Gravis / Q000150:complications / Q000175:diagnosis*; D011446:Prospective Studies; D012680:Sensitivity and Specificity; D055815:Young Adult
chemical_list: D007053:Ice