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CT of the chest, abdomen and pelvis was undertaken to identify any occult malignancy, and a large bowel carcinoma in situ was identified and resected. His central nervous system and autonomic symptoms significantly improved following surgery, but neuromyotonia persisted, and this was treated with intravenous immunoglobulins and steroids. Early detection of bowel cancer in this patient enabled curative treatment.<\/jats:p>","DOI":"10.1136\/bcr-2023-256407","type":"journal-article","created":{"date-parts":[[2023,11,17]],"date-time":"2023-11-17T20:45:28Z","timestamp":1700253928000},"page":"e256407","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":2,"title":["Occult bowel cancer presenting as Morvan syndrome"],"prefix":"10.1136","volume":"16","author":[{"given":"Shyama","family":"Alagoda","sequence":"first","affiliation":[{"name":"Clinical Neurophyisology, Somerset NHS Foundation Trust, Taunton, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sunil","family":"Wimalaratna","sequence":"additional","affiliation":[{"name":"Neurology, Kettering General Hospital NHS Foundation Trust, Kettering, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tharuka Milinda","family":"Herath","sequence":"additional","affiliation":[{"name":"Neurology, Kettering General Hospital NHS Foundation Trust, Kettering, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2023,11,17]]},"reference":[{"key":"2025082701220447000_16.11.e256407.1","doi-asserted-by":"crossref","first-page":"857","DOI":"10.1136\/jnnp.65.6.857","article-title":"Morvan\u2019s fibrillary chorea: a paraneoplastic manifestation of thymoma","volume":"65","author":"Lee","year":"1998","journal-title":"J Neurol Neurosurg Psychiatry"},{"key":"2025082701220447000_16.11.e256407.2","doi-asserted-by":"publisher","DOI":"10.1002\/ana.23577"},{"key":"2025082701220447000_16.11.e256407.3","doi-asserted-by":"publisher","DOI":"10.1097\/00004691-200411000-00008"},{"key":"2025082701220447000_16.11.e256407.4","doi-asserted-by":"publisher","DOI":"10.1136\/jnnp.24.4.319"},{"key":"2025082701220447000_16.11.e256407.5","doi-asserted-by":"crossref","first-page":"771","DOI":"10.1212\/WNL.54.3.771","article-title":"Morvan\u2019s syndrome associated with voltage-gated K+ channel antibodies","volume":"54","author":"Barber","year":"2000","journal-title":"Neurology"},{"key":"2025082701220447000_16.11.e256407.6","unstructured":"Masood W , Sitammagari KK . 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