title: Frequent laboratory abnormalities in CIDP patients.
abstract: The role of screening laboratory tests in chronic inflammatory demyelinating polyneuropathy (CIDP) is currently unknown. The objectives of this study are to explore common laboratory test abnormalities in CIDP patients.
  
  
  
  CIDP subjects attending the Neuromuscular Clinic between 01/2013 and 12/2014 were evaluated. Demographic data, clinical history, physical examination, and laboratory test results were extracted from their charts.
  
  
  
  Seventy-nine charts were reviewed. Mean age was 61 ± 11 years. Most (84%) CIDP patients had laboratory test abnormalities; the most frequent were paraproteinemia (29%) and elevated HbA1C (28%) and creatine kinase (27%). Additional abnormalities included anemia in 19%, and elevated anti-neutrophil cytoplasmic antibody, erythrocyte sedimentation rate, and urate in 17%, elevated antinuclear antibodies, rheumatoid factor, and thyroid-stimulating hormone in 11%, and abnormal C3 in 10%.
  
  
  
  Laboratory test abnormalities were found in most CIDP patients. The most common were paraproteinemia, higher than expected frequency of diabetes, and unexpected CK elevation. Additional abnormalities included anemia, high urate levels, and common biomarkers for vasculitic neuropathies. Muscle Nerve 53: 862-865, 2016.
authors.affiliation: Ellen and Martin Prosserman Centre for Neuromuscular Diseases, Division of Neurology, Department of Medicine, University Health Network, University of Toronto, Toronto General Hospital, 200 Elizabeth Street, Room 5, EB 309, Toronto, Canada.
authors.forename: Alon
authors.initials: A
authors.lastname: Abraham
authors.affiliation: Department of Neurology, King Khalid University Hospital, King Saud University, Saudi Arabia.
authors.forename: Hana
authors.initials: H
authors.lastname: Albulaihe
authors.affiliation: Department of Neurology, King Fahad Hospital of the University, University of Dammam, Saudi Arabia.
authors.forename: Majed
authors.initials: M
authors.lastname: Alabdali
authors.affiliation: Ellen and Martin Prosserman Centre for Neuromuscular Diseases, Division of Neurology, Department of Medicine, University Health Network, University of Toronto, Toronto General Hospital, 200 Elizabeth Street, Room 5, EB 309, Toronto, Canada.
authors.forename: Mohammad
authors.initials: M
authors.lastname: Qrimli
authors.affiliation: Ellen and Martin Prosserman Centre for Neuromuscular Diseases, Division of Neurology, Department of Medicine, University Health Network, University of Toronto, Toronto General Hospital, 200 Elizabeth Street, Room 5, EB 309, Toronto, Canada.
authors.forename: Ari
authors.initials: A
authors.lastname: Breiner
authors.affiliation: Ellen and Martin Prosserman Centre for Neuromuscular Diseases, Division of Neurology, Department of Medicine, University Health Network, University of Toronto, Toronto General Hospital, 200 Elizabeth Street, Room 5, EB 309, Toronto, Canada.
authors.forename: Carolina
authors.initials: C
authors.lastname: Barnett
authors.affiliation: Ellen and Martin Prosserman Centre for Neuromuscular Diseases, Division of Neurology, Department of Medicine, University Health Network, University of Toronto, Toronto General Hospital, 200 Elizabeth Street, Room 5, EB 309, Toronto, Canada.
authors.forename: Hans D
authors.initials: HD
authors.lastname: Katzberg
authors.affiliation: Division of Endocrinology and Metabolism, Department of Medicine, Mount Sinai, Hospital and Lunenfeld Tanenbaum Research Institute, University of Toronto, Toronto, Canada.
authors.forename: Leif E
authors.initials: LE
authors.lastname: Lovblom
authors.affiliation: Division of Endocrinology and Metabolism, Department of Medicine, Mount Sinai, Hospital and Lunenfeld Tanenbaum Research Institute, University of Toronto, Toronto, Canada.
authors.forename: Bruce A
authors.initials: BA
authors.lastname: Perkins
authors.affiliation: Ellen and Martin Prosserman Centre for Neuromuscular Diseases, Division of Neurology, Department of Medicine, University Health Network, University of Toronto, Toronto General Hospital, 200 Elizabeth Street, Room 5, EB 309, Toronto, Canada.
authors.forename: Vera
authors.initials: V
authors.lastname: Bril
mesh_terms: D000368:Aged; D019268:Antibodies, Antineutrophil Cytoplasmic / Q000378:metabolism; D000974:Antibodies, Antinuclear / Q000378:metabolism; D001799:Blood Sedimentation; D003402:Creatine Kinase / Q000097:blood; D005260:Female; D006442:Glycated Hemoglobin / Q000378:metabolism; D006801:Humans; D008297:Male; D008875:Middle Aged; D020277:Polyradiculoneuropathy, Chronic Inflammatory Demyelinating / Q000175:diagnosis* / Q000378:metabolism* / Q000503:physiopathology; D012189:Retrospective Studies; D012217:Rheumatoid Factor / Q000378:metabolism; D013972:Thyrotropin / Q000378:metabolism
chemical_list: D019268:Antibodies, Antineutrophil Cytoplasmic; D000974:Antibodies, Antinuclear; D003402:Creatine Kinase; D006442:Glycated Hemoglobin; D012217:Rheumatoid Factor; D013972:Thyrotropin; C517652:hemoglobin A1c protein, human
keywords: CIDP; CK; anemia; diabetes; laboratory tests; paraproteinemia