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These cysts can range in size and symptoms: from small and asymptomatic to large and clinically evident. CPAM is typically identified during prenatal ultrasonography as an abnormal lung mass, predominantly involving a single pulmonary lobe. We herein describe a case of a fetus diagnosed with CPAMs type 1 harboring a\n                    <jats:italic>KRAS<\/jats:italic>\n                    pathogenic variant.\n                  <\/jats:p>","DOI":"10.1155\/crog\/4960286","type":"journal-article","created":{"date-parts":[[2026,8,20]],"date-time":"2026-08-20T04:52:46Z","timestamp":1787201566000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Congenital Pulmonary Airway Malformation Type 1 With KRAS Mutation: A Case Report and Literature Review"],"prefix":"10.1155","volume":"2026","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8408-7646","authenticated-orcid":false,"given":"Eleonora","family":"Nardi","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0001-5185-3463","authenticated-orcid":false,"given":"Chiara","family":"De Blasi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0008-6997-9962","authenticated-orcid":false,"given":"Chiara","family":"Bartolini","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6669-420X","authenticated-orcid":false,"given":"Francesca","family":"Gensini","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6733-7658","authenticated-orcid":false,"given":"Lucia","family":"Pasquini","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1696-5651","authenticated-orcid":false,"given":"Francesca","family":"Castiglione","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,8,19]]},"reference":[{"key":"e_1_2_10_1_2","doi-asserted-by":"publisher","DOI":"10.1038\/s41572-023-00470-1"},{"key":"e_1_2_10_2_2","volume-title":"Congenital Pulmonary Airway Malformation","author":"Mehta P. 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