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Our case demonstrates that multiple small chorioangiomas might behave like a giant chorioangioma, causing significant neonatal morbidity. This report also highlights the importance of assessing the placental histology where no identifiable cause for neonatal cardiomyopathy can be found.<\/jats:p>","DOI":"10.1136\/bcr-2021-244956","type":"journal-article","created":{"date-parts":[[2021,10,8]],"date-time":"2021-10-08T11:53:12Z","timestamp":1633693992000},"page":"e244956","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":5,"title":["Placental chorioangioma: an unusual cause of neonatal cardiomyopathy"],"prefix":"10.1136","volume":"14","author":[{"given":"Tom","family":"Solan","sequence":"first","affiliation":[{"name":"Neonatology, Joan Kirner Wome's and Children's, Sunshine Hospital, Saint Albans, Victoria, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Niranjan","family":"Thomas","sequence":"additional","affiliation":[{"name":"Neonatology, Joan Kirner Wome's and Children's, Sunshine Hospital, Saint Albans, Victoria, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Penny","family":"Kee","sequence":"additional","affiliation":[{"name":"Neonatology, Joan Kirner Wome's and Children's, Sunshine Hospital, Saint Albans, Victoria, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2021,10,8]]},"reference":[{"key":"2025082623082223000_14.10.e244956.1","doi-asserted-by":"publisher","DOI":"10.1542\/neo.19-7-e403"},{"key":"2025082623082223000_14.10.e244956.2","doi-asserted-by":"crossref","first-page":"139e","DOI":"10.1542\/neo.1-8-e139","article-title":"Cardiomyopathy in infants: a brief overview","volume":"1","author":"Rosenthal","year":"2000","journal-title":"Neoreviews"},{"key":"2025082623082223000_14.10.e244956.3","doi-asserted-by":"crossref","first-page":"201","DOI":"10.1016\/j.repc.2016.10.007","article-title":"Neonatal dilated cardiomyopathy","volume":"36","author":"Soares","year":"2017","journal-title":"Rev Port Cardiol"},{"key":"2025082623082223000_14.10.e244956.4","doi-asserted-by":"crossref","first-page":"1523","DOI":"10.1111\/j.1651-2227.2008.00957.x","article-title":"Cardiomyopathy in newborns and infants: a broad spectrum of aetiologies and poor prognosis","volume":"97","author":"Badertscher","year":"2008","journal-title":"Acta Paediatr"},{"key":"2025082623082223000_14.10.e244956.5","doi-asserted-by":"crossref","unstructured":"Vaidyanathan GBA , Perchani J , et al . 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