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The pattern electroretinogram (PERG), standard pattern visual evoked potentials (PVEPs) and multichannel visual evoked potentials (mVEPs) (ISCEV standards) were performed. The results obtained from the electrophysiological tests were compared to the same number of age-matched healthy controls.\n<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>Statistically significant differences between the patients with microadenoma and healthy controls were detected in all electrophysiological tests (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001). The most frequent abnormalities were observed in mVEPs (25\/33 patients, 75.8%; 43\/66 eyes, 65.2%). The most frequent features registered in this test were: (1\u00b04\u2032)\u2014an increase in the P100wave latency from uncrossed fibres (13\/33 patients, 39.39%; 21\/66 eyes, 31.8%) and (0\u00b016\u2032)\u2014an amplitude reduction of this wave from the crossed fibres (11\/33 patients, 33.33%; 19\/66 eyes, 28.8%). The changes in PVEPs (15\/33 patients, 45.5%; 25\/66 eyes, 37.9%) and PERG (10\/33 patients, 30.3%; 15\/66 eyes, 22.7%) were also registered. Of all the tests and parameters analysed in the study, the greatest diagnostic value in detecting the visual pathway dysfunction in this group of patients was the amplitude of P100 wave from the crossed fibres of the mVEPs (1\u00b04\u2032) with a sensitivity of 60.6% and a specificity of 93.8%. These parameters suggest that this type of dysfunction is downstream to the chiasm and can also indicate the visual pathway dysfunction severity.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusions<\/jats:title>\n                <jats:p>In patients with microadenoma, the abnormalities in the electrophysiological tests are registered even without clinical evidence of visual impairment from the routine ophthalmological examination, SAP, OCT and chiasmal compression in MRI. The mVEPs have the most significant role in the diagnosis of the visual pathway dysfunction in patients with microadenoma.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1007\/s10633-021-09827-x","type":"journal-article","created":{"date-parts":[[2021,3,20]],"date-time":"2021-03-20T11:02:32Z","timestamp":1616238152000},"page":"115-127","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["The electrophysiological tests in the early detection of the visual pathway dysfunction in patients with microadenoma"],"prefix":"10.1007","volume":"143","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7057-0103","authenticated-orcid":false,"given":"Ewelina","family":"Lachowicz","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wojciech","family":"Lubi\u0144ski","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wojciech","family":"Gos\u0142awski","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"El\u017cbieta","family":"Andrysiak-Mamos","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Agnieszka","family":"Ka\u017amierczyk-Puchalska","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anhelli","family":"Syrenicz","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2021,3,20]]},"reference":[{"key":"9827_CR1","first-page":"798","volume":"19","author":"SL Asa","year":"1998","unstructured":"Asa SL, Ezzat S (1998) The cytogenesis and pathogenesis of pituitary adenomas. 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This study was approved by the Bioethics Committee of the Pomeranian Medical University (KB 0012\/54\/15).","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Statement of human rights"}},{"value":"This chapter does not contain any studies with animals performed by any of the authors.","order":5,"name":"Ethics","group":{"name":"EthicsHeading","label":"Statement on the welfare of animals"}}]}}