{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T20:57:27Z","timestamp":1790715447509,"version":"4.1.0"},"reference-count":17,"publisher":"Oxford University Press (OUP)","issue":"9","license":[{"start":{"date-parts":[[2026,9,22]],"date-time":"2026-09-22T00:00:00Z","timestamp":1790035200000},"content-version":"vor","delay-in-days":26,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,8,27]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Cystic tumours of the AV node (CTAVN) are exceptionally uncommon congenital cardiac tuours, with an incidence of 0.0017-0.03%.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Case summary<\/jats:title>\n                    <jats:p>A 47-year-old woman with recurrent symptomatic tachycardia underwent an ablation. Coronary sinus was noted to be enlarged. Subsequent cardiac CT revelead a well-circumscribed cystic lesioni in the Triangle of Koch, suspicious of a CTAVN. Multimodal imaging, including echocardiography, coronary angiography and cardiac MRI confirmed a non-vascular, encapsulated lesion with imaging characteristics consistent with a benign cystic mass. Given the risk of sudden cardiac death, surgical resection was performed. Histopathology confirmed CTAVN. The postoperative course as complicated by complete heart block requiring pacemaker implantation, with no recurrence at one year.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Discussion<\/jats:title>\n                    <jats:p>CTAVN is a rare but clinically significant benign tumour associated with conduction abnormalities and malignant arrhythmias. This care highlights the importance of multimodal imaging in diagnosis and the role of early surgical intervention to mitigate life-threatening complications.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1093\/ehjcr\/ytag686","type":"journal-article","created":{"date-parts":[[2026,9,19]],"date-time":"2026-09-19T11:39:55Z","timestamp":1789817995000},"source":"Crossref","is-referenced-by-count":0,"title":["Small but lethal: cystic tumour of the atrioventricular node\u2014a case report"],"prefix":"10.1093","volume":"10","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8974-4265","authenticated-orcid":false,"given":"Jessica V","family":"Yao","sequence":"first","affiliation":[{"name":"Department of Cardiology, The Royal Melbourne Hospital , 300 Grattan Street, Parkville, 3050 Victoria ,","place":["Australia"]},{"name":"Department of Medicine, Dentistry and Health Sciences, The University of Melbourne , Grattan Street, Parkville, 3010 Victoria ,","place":["Australia"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Homa","family":"Forotan","sequence":"additional","affiliation":[{"name":"Department of Cardiology, The Royal Melbourne Hospital , 300 Grattan Street, Parkville, 3050 Victoria ,","place":["Australia"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5857-3520","authenticated-orcid":false,"given":"Geoffrey","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Cardiology, The Royal Melbourne Hospital , 300 Grattan Street, Parkville, 3050 Victoria ,","place":["Australia"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2240-130X","authenticated-orcid":false,"given":"William","family":"Wilson","sequence":"additional","affiliation":[{"name":"Department of Cardiology, The Royal Melbourne Hospital , 300 Grattan Street, Parkville, 3050 Victoria ,","place":["Australia"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kai En","family":"Leong","sequence":"additional","affiliation":[{"name":"Department of Cardiology, The Royal Melbourne Hospital , 300 Grattan Street, Parkville, 3050 Victoria ,","place":["Australia"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2026,9,22]]},"reference":[{"key":"2026092915564233200_ytag686-B1","article-title":"Cystic tumor of the atrioventricular node causing rapid-onset and reversible complete heart block","volume":"7","author":"Velasco","year":"2023","journal-title":"JACC Case Rep"},{"key":"2026092915564233200_ytag686-B2","doi-asserted-by":"crossref","first-page":"3313","DOI":"10.21037\/jtd.2017.08.101","article-title":"Cystic tumor of the atrioventricular node: a review of the literature","volume":"9","author":"Luc","year":"2017","journal-title":"J Thorac Dis"},{"key":"2026092915564233200_ytag686-B3","doi-asserted-by":"crossref","first-page":"1873","DOI":"10.1016\/j.athoracsur.2013.03.036","article-title":"Cystic atrioventricular node tumor excision by minimally invasive surgery","volume":"96","author":"Careddu","year":"2013","journal-title":"Ann Thorac Surg"},{"key":"2026092915564233200_ytag686-B4","doi-asserted-by":"crossref","first-page":"823","DOI":"10.1111\/j.1540-8167.1995.tb00358.x","article-title":"Intermittent preexcitation and mesothelioma of the atrioventricular node: a hitherto undescribed entity","volume":"6","author":"Bharati","year":"1995","journal-title":"J Cardiovasc Electrophysiol"},{"key":"2026092915564233200_ytag686-B5","doi-asserted-by":"crossref","first-page":"287","DOI":"10.1080\/20961790.2019.1595349","article-title":"Cystic tumour of the atrioventricular node: case report and literature review","volume":"4","author":"Cohle","year":"2019","journal-title":"Forensic Sci Res"},{"key":"2026092915564233200_ytag686-B6","doi-asserted-by":"crossref","first-page":"293","DOI":"10.1016\/j.jaccao.2020.05.009","article-title":"Cardiac tumors: JACC cardiooncology state-of-the-art review","volume":"2","author":"Tyebally","year":"2020","journal-title":"JACC CardioOncol"},{"key":"2026092915564233200_ytag686-B7","doi-asserted-by":"crossref","first-page":"26","DOI":"10.1148\/radiol.13121239","article-title":"MR imaging of cardiac tumors and masses: a review of methods and clinical applications","volume":"268","author":"Motwani","year":"2013","journal-title":"Radiology"},{"key":"2026092915564233200_ytag686-B8","doi-asserted-by":"crossref","DOI":"10.1161\/CIRCIMAGING.123.016115","article-title":"Cardiac magnetic resonance to predict cardiac mass malignancy: the CMR mass score","volume":"17","author":"Paolisso","year":"2024","journal-title":"Circ Cardiovasc Imaging"},{"key":"2026092915564233200_ytag686-B9","doi-asserted-by":"crossref","first-page":"1107","DOI":"10.1161\/CIRCULATIONAHA.114.010992","article-title":"Intracardiac bronchogenic cyst: report of a growing lesion","volume":"130","author":"Park","year":"2014","journal-title":"Circulation"},{"key":"2026092915564233200_ytag686-B10","doi-asserted-by":"crossref","DOI":"10.3389\/fcvm.2024.1466016","article-title":"Case report: multimodality imaging of a bronchogenic cyst in the interatrial septum","volume":"11","author":"Mingming","year":"2024","journal-title":"Front Cardiovasc Med"},{"key":"2026092915564233200_ytag686-B11","doi-asserted-by":"crossref","first-page":"120","DOI":"10.1016\/j.carpath.2011.05.004","article-title":"Cystic tumor of the atrioventricular node: rare antemortem diagnosis","volume":"21","author":"Law","year":"2012","journal-title":"Cardiovasc Pathol"},{"key":"2026092915564233200_ytag686-B12","doi-asserted-by":"crossref","first-page":"1035","DOI":"10.1016\/j.radcr.2023.11.072","article-title":"Multimodality imaging of a rare intracardiac bronchogenic cyst","volume":"19","author":"Gonzalez","year":"2024","journal-title":"Radiol Case Rep"},{"key":"2026092915564233200_ytag686-B13","doi-asserted-by":"crossref","first-page":"441","DOI":"10.1148\/radiology.217.2.r00nv19441","article-title":"Bronchogenic cyst: imaging features with clinical and histopathologic correlation","volume":"217","author":"McAdams","year":"2000","journal-title":"Radiology"},{"key":"2026092915564233200_ytag686-B14","doi-asserted-by":"crossref","DOI":"10.1161\/CIRCIMAGING.118.008159","article-title":"Multimodality imaging of a rare atrioventricular nodal tumor","volume":"11","author":"Fiset","year":"2018","journal-title":"Circ Cardiovasc Imaging"},{"key":"2026092915564233200_ytag686-B15","doi-asserted-by":"crossref","first-page":"1334","DOI":"10.1093\/europace\/euw123","article-title":"Cystic tumour of the atrioventricular node: can an electrophysiological study predict sudden death?","volume":"18","author":"Ueda","year":"2016","journal-title":"Europace"},{"key":"2026092915564233200_ytag686-B16","doi-asserted-by":"crossref","DOI":"10.1136\/bcr-2017-219314","article-title":"Cystic tumour of the atrioventricular node: treatment dilemma","volume":"2017","author":"Abuzeid","year":"2017","journal-title":"BMJ Case Rep"},{"key":"2026092915564233200_ytag686-B17","doi-asserted-by":"crossref","DOI":"10.1016\/j.xjtc.2026.102377","article-title":"Surgical excision of a cystic tumor of the atrioventricular nodal region with patch repair for a Gerbode defect: a case report","volume":"37","author":"Yamamoto","year":"2026","journal-title":"JTCVS Tech"}],"container-title":["European Heart Journal - Case Reports"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/academic.oup.com\/ehjcr\/advance-article-pdf\/doi\/10.1093\/ehjcr\/ytag686\/71299614\/ytag686.pdf","content-type":"application\/pdf","content-version":"am","intended-application":"syndication"},{"URL":"https:\/\/academic.oup.com\/ehjcr\/article-pdf\/10\/9\/ytag686\/71299614\/ytag686.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"syndication"},{"URL":"https:\/\/academic.oup.com\/ehjcr\/article-pdf\/10\/9\/ytag686\/71299614\/ytag686.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T19:56:53Z","timestamp":1790711813000},"score":1,"resource":{"primary":{"URL":"https:\/\/academic.oup.com\/ehjcr\/article\/doi\/10.1093\/ehjcr\/ytag686\/8826361"}},"subtitle":[],"editor":[{"given":"Henrike Aenne Katrin","family":"Hillmann","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"editor"}]},{"given":"Ahsan Aftab","family":"Khan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"editor"}]},{"given":"Deepti","family":"Ranganathan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"editor"}]}],"short-title":[],"issued":{"date-parts":[[2026,8,27]]},"references-count":17,"journal-issue":{"issue":"9","published-print":{"date-parts":[[2026,8,27]]}},"URL":"https:\/\/doi.org\/10.1093\/ehjcr\/ytag686","relation":{},"ISSN":["2514-2119"],"issn-type":[{"value":"2514-2119","type":"electronic"}],"subject":[],"published-other":{"date-parts":[[2026,9]]},"published":{"date-parts":[[2026,8,27]]},"article-number":"ytag686"}}