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The patient was initiated on intravenous immunoglobulin therapy with good effect on his general muscle weakness and respiratory symptoms, lung function and vocal cord abductor function. MMN with conduction block is a rare autoimmune condition, and vocal cord paresis from bilateral Xth cranial nerve involvement (recurrent laryngeal) is a very rare presentation of an MMN. Early diagnosis led to good patient outcomes.<\/jats:p>","DOI":"10.1136\/bcr-2026-272382","type":"journal-article","created":{"date-parts":[[2026,7,7]],"date-time":"2026-07-07T11:17:33Z","timestamp":1783423053000},"page":"e272382","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":0,"title":["Bilateral vocal cord paralysis in multifocal motor neuropathy"],"prefix":"10.1136","volume":"19","author":[{"ORCID":"https:\/\/orcid.org\/0009-0002-0302-1520","authenticated-orcid":false,"given":"Talia","family":"Bartley","sequence":"first","affiliation":[{"name":"Respiratory Medicine, Prince Philip Hospital, Llanelli, Wales, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Charlotte","family":"James","sequence":"additional","affiliation":[{"name":"Respiratory Medicine, Prince Philip Hospital, Llanelli, Wales, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Keir Edward","family":"Lewis","sequence":"additional","affiliation":[{"name":"Respiratory Medicine, Prince Philip Hospital, Llanelli, Wales, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"239","published-online":{"date-parts":[[2026,7,7]]},"reference":[{"key":"2026070704151229000_19.7.e272382.1","unstructured":"Kanda S , Kanda T . 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