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Article type: Research Article
Authors: Horlings, Corinne G.C.a | Rath, Jakobb | Finsterer, Josefc; * | Wanschitz, Julia V.a | Löscher, Wolfgang N.a
Affiliations: [a] Department of Neurology, Medical University Innsbruck, Austria | [b] Department of Neurology, Medical University Vienna, Austria | [c] Krankenanstalt Rudolfstiftung, Messerli Institute, Vienna, Austria
Correspondence: [*] Correspondence to: Josef Finsterer, MD, PhD, Postfach 20 1180 Vienna Austria, Europe. Tel.: +43 1 71165 72085; Fax: +43 1 71165; E-mail: fifigs1@yahoo.de.
Abstract: Objectives:laboratory tests for work-up of hereditary and acquired neuropathies of peripheral nerves are frequently uncritically utilized. This overview focuses on the most common laboratory tests and investigations needed for diagnosing PNPs by the general neurologist. Method:Literature search. Results:laboratory tests recommended for the work-up of hereditary and acquired neuropathies should be chosen according to the individual and family history, clinical presentation, and electrophysiological findings. Laboratory tests should be selected specifically according to the suspected type of neuropathy to avoid unnecessary tests and expenses. Work-up should include as few samples as necessary for uncovering the etiology and should consider the sensitivity/specificity of the tests applied.. Basic screening tests for neuropathies should include a blood cell count, thyroid, renal and liver function tests, blood glucose levels, HbA1c, vitamin-B12, and immunofixation. Other laboratory investigations should be carried out only if a specific phenotype is present or if unexpected changes of the disease course occur. In these cases referral to a neuromuscular center is recommended. Conclusions:Laboratory tests are helpful for the diagnosis of acquired and hereditary neuropathies but these tests should be ordered according to the history, clinical presentation and findings on electrophysiological investigations. If basic laboratory parameters fail to uncover the etiology, patients should be referred to a center specialized in neuromuscular disorders.
Keywords: Neuropathy, nerve conduction, diagnosis, hereditary, electromyography
DOI: 10.3233/JND-200488
Journal: Journal of Neuromuscular Diseases, vol. 7, no. 3, pp. 279-286, 2020
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