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Its therapeutic results are complex and often catastrophic, making its treatment a true challenge.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Historical background<\/jats:title>\n                    <jats:p>VOGM is characterized by the persistence of direct arteriovenous communications between the choroidal feeding arteries and the embryonic vein, known as the median prosencephalic vein of Markowski.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Clinical presentation, diagnosis, and pathophysiology<\/jats:title>\n                    <jats:p>The malformation develops between the 8th and 11th weeks of gestation. Diagnostic suspicion is usually made through fetal ultrasound after the 18th week of gestation or later. Fetal MRI complements the diagnosis.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Management, prognosis, and outcomes<\/jats:title>\n                    <jats:p>There are two groups of patients with VOGM: severe cases, with persistent high-flow arteriovenous shunts leading to multiorgan failure, and mild cases with a lower mortality rate and a more favorable outcome. The use of vascular parameters, based on the diameter of the falcine sinus measured by fetal MRI, can serve as a predictor of neonatal outcome and therapeutic choice.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Case report<\/jats:title>\n                    <jats:p>A 33-year-old primigravida presented with a fetus diagnosed with VOGM by fetal ultrasound at 32\u00a0weeks of gestation. An aneurysmal dilation of the Galen vein was observed, with a transverse falcine sinus measuring 10.5\u00a0mm. Aneurysm dilatation dimensions: 25\u2009\u00d7\u200921\u2009\u00d7\u200920\u00a0mm. Fetal MRI confirmed a falcine sinus width of 10.5\u00a0mm, indicating a 96% chance of poor outcome. Fetal embolization of the VOGM was performed, followed by postnatal treatment.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>In this article, we review the main principles of VOGM management and present a case treated during pregnancy, illustrating a potential therapeutic strategy. We suggest that fetal embolization of VOGM, when appropriately indicated, may represent an emerging approach in the management of this severe condition.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1007\/s00381-026-07261-5","type":"journal-article","created":{"date-parts":[[2026,4,25]],"date-time":"2026-04-25T20:56:33Z","timestamp":1777150593000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Galen vein malformation\u2014intrauterine treatment"],"prefix":"10.1007","volume":"42","author":[{"given":"Sergio","family":"Cavalheiro","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3552-6347","authenticated-orcid":false,"given":"Marcos Devanir Silva","family":"da Costa","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7067-0657","authenticated-orcid":false,"given":"Paloam Cardoso","family":"N\u00f4vo","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Michel Eli","family":"Frudit","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fernando Seiji","family":"Suzuki","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Maur\u00edcio Mendes","family":"Barbosa","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Patr\u00edcia Alessandra","family":"Dastoli","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"St\u00e9phanno Gomes Pereira","family":"Sarmento","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"\u00cdtalo Capraro","family":"Suriano","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ant\u00f4nio Fernandes","family":"Moron","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2026,4,25]]},"reference":[{"key":"7261_CR1","doi-asserted-by":"publisher","first-page":"1105","DOI":"10.3174\/ajnr.A6585","volume":"41","author":"L Arko","year":"2020","unstructured":"Arko L, Lambrych M, Montaser A, Zurakowski D, Orbach BD (2020) Fetal and neonatal MRI predictors of aggressive early clinical course in vein of Galen malformation. 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