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A diagnosis of Guillain\u2010Barr\u00e9 syndrome was made on the basis of clinical presentation, cerebrospinal fluid analysis, and electroneurography. In four of them, the therapeutic approach included the administration of intravenous immunoglobulin (0.4\u2009g\/kg for 5 days), which resulted in the improvement of neurological symptoms. Clinical neurophysiology revealed the presence of conduction block, absence of F waves, and in two cases a significant decrease in amplitude of compound motor action potential compound muscle action potential (cMAP). Four patients presented a mild facial nerve involvement limited to the muscles of the lower face, with sparing of the forehead muscles associated to ageusia. In one patient, taste assessment showed right\u2010sided ageusia of the tongue, ipsilateral to the mild facial palsy. In three patients we observed albuminocytological dissociation in the cerebrospinal fluid, and notably, we found an increase of inflammatory mediators such as the interleukin\u20108. Peripheral nervous system involvement after infection with COVID\u201019 is possible and may include several signs that may be successfully treated with immunoglobulin therapy.<\/jats:p>","DOI":"10.1002\/jmv.26289","type":"journal-article","created":{"date-parts":[[2020,7,14]],"date-time":"2020-07-14T16:09:23Z","timestamp":1594742963000},"page":"766-774","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":71,"title":["Clinical neurophysiology and cerebrospinal liquor analysis to detect Guillain\u2010Barr\u00e9 syndrome and polyneuritis cranialis in COVID\u201019 patients: A case series"],"prefix":"10.1002","volume":"93","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5305-6268","authenticated-orcid":false,"given":"Paolo","family":"Manganotti","sequence":"first","affiliation":[{"name":"Clinical Unit of Neurology, Department of Medicine, Surgery, and Health Sciences, Cattinara University Hospital ASUGI University of Trieste 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