{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,27]],"date-time":"2026-03-27T01:15:17Z","timestamp":1774574117049,"version":"3.50.1"},"reference-count":10,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2020,10,28]],"date-time":"2020-10-28T00:00:00Z","timestamp":1603843200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Thoracic Cancer"],"published-print":{"date-parts":[[2021,1]]},"abstract":"<jats:sec><jats:label\/><jats:p>Dacomitinib, a second\u2010generation epidermal growth factor receptor (EGFR)\u2010tyrosine kinase inhibitor, is a standard therapeutic option for patients with <jats:italic>EGFR<\/jats:italic>\u2010mutant non\u2010small cell lung cancer (NSCLC). However, its efficacy in patients with central nervous system lesions is unclear. Here, we describe a case of <jats:italic>EGFR<\/jats:italic>\u2010mutant NSCLC whose neurological symptoms were due to leptomeningeal carcinomatosis that was successfully treated with dacomitinib. After initiation of dacomitinib, the neurological symptoms of the patient were remarkably improved and leptomeningeal dissemination and brain metastases were shown to have regressed on magnetic resonance imaging (MRI) scan. To our knowledge, this is the first report showing the efficacy of dacomitinib in a patient with leptomeningeal carcinomatosis due to <jats:italic>EGFR<\/jats:italic>\u2010mutant NSCLC. The current case suggests that dacomitinib is a novel treatment option for patients with <jats:italic>EGFR<\/jats:italic>\u2010mutant NSCLC accompanied by central nervous system lesions, even those with symptomatic leptomeningeal carcinomatosis.<\/jats:p><\/jats:sec><jats:sec><jats:title>Key points<\/jats:title><\/jats:sec><jats:sec><jats:title>Significant findings of the study<\/jats:title><jats:p>This is the first report showing the efficacy of dacomitinib in a patient with leptomeningeal carcinomatosis due to <jats:italic>EGFR<\/jats:italic>\u2010mutant NSCLC.<\/jats:p><\/jats:sec><jats:sec><jats:title>What this study adds<\/jats:title><jats:p>The current case suggests that dacomitinib is a novel treatment option for patients with <jats:italic>EGFR<\/jats:italic>\u2010mutant NSCLC accompanied by CNS lesions, even in those with symptomatic leptomeningeal carcinomatosis.<\/jats:p><\/jats:sec>","DOI":"10.1111\/1759-7714.13712","type":"journal-article","created":{"date-parts":[[2020,10,28]],"date-time":"2020-10-28T11:47:16Z","timestamp":1603885636000},"page":"114-116","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Remarkable response to dacomitinib in a patient with leptomeningeal carcinomatosis due to <scp><i>EGFR<\/i><\/scp>\u2010mutant non\u2010small cell lung cancer"],"prefix":"10.1111","volume":"12","author":[{"given":"Shun","family":"Mizusaki","sequence":"first","affiliation":[{"name":"Department of Respiratory Medicine Kitakyushu Municipal Medical Center  Fukuoka Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9476-8840","authenticated-orcid":false,"given":"Kohei","family":"Otsubo","sequence":"additional","affiliation":[{"name":"Department of Respiratory Medicine Kitakyushu Municipal Medical Center  Fukuoka 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