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The patient remained constipated despite prokinetics and laxatives, leading to the diagnostic hypothesis of paraneoplastic motility disorder and opioid-induced constipation. Abdominal tomography ruled out the possibility of mechanical obstruction. As complications, the patient presented superior vena cava syndrome and opioid (morphine) intoxication. The patient died a few days later. The management of this case highlights the importance of multidisciplinary care and the challenges of palliative oncology care. Paraneoplastic motility disorder must always be considered among the mechanisms of intestinal dysfunction in patients with advanced oncological disease.<\/jats:p>","DOI":"10.1136\/bcr-2020-237835","type":"journal-article","created":{"date-parts":[[2021,1,26]],"date-time":"2021-01-26T12:41:48Z","timestamp":1611664908000},"page":"e237835","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":3,"title":["Gastrointestinal dysmotility in a patient with advanced lung cancer: paraneoplastic or drug-induced?"],"prefix":"10.1136","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3102-5991","authenticated-orcid":false,"given":"Raphael Figuiredo","family":"Dias","sequence":"first","affiliation":[{"name":"Universidade Federal de Minas Gerais Faculdade de Medicina, Belo Horizonte, Minas Gerais, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mirella Monique 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