{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,8,28]],"date-time":"2025-08-28T09:40:01Z","timestamp":1756374001526,"version":"3.44.0"},"reference-count":18,"publisher":"BMJ","issue":"7","content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Case Rep"],"accepted":{"date-parts":[[2025,6,9]]},"published-print":{"date-parts":[[2025,7]]},"abstract":"<jats:p>Chorangiomas affect less than 1% of pregnancies. However, while small chorangiomas are mainly asymptomatic, large placental chorangiomas may lead to severe neonatal and maternal complications. Ultrasound and Doppler technology imaging enable appropriate prenatal diagnosis and surveillance. We present a case of a large chorangioma in a mid-20s primigravid under specialised care at a tertiary referral hospital due to her medical history. The second-trimester scan detected a placental lesion measuring approximately 40\u2009mm, which exhibited significant growth throughout the gestational period. This case was managed by a multidisciplinary team that provided close clinical and imaging surveillance. A caesarean section was performed at 37 weeks due to pre-eclampsia and labour arrest. Both mother and baby were discharged home 3\u2009days postpartum. Histological analysis confirmed the suspected diagnosis of a chorangioma. This case highlights a favourable outcome following conservative management of a large placental chorangioma.<\/jats:p>","DOI":"10.1136\/bcr-2024-264137","type":"journal-article","created":{"date-parts":[[2025,7,1]],"date-time":"2025-07-01T21:30:12Z","timestamp":1751405412000},"page":"e264137","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":0,"title":["Favourable maternal and neonatal outcomes following expectant management of a giant placental chorangioma"],"prefix":"10.1136","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2848-3748","authenticated-orcid":false,"given":"Diana","family":"Pereira Azevedo","sequence":"first","affiliation":[{"name":"Fetal Medicine Centre, Unidade Local de Sa\u00fade de Santo Ant\u00f3nio, Oporto, Portugal"},{"name":"Obstetrics and Gynecology, Unidade Local de Sa\u00fade de Braga, Braga, Portugal"},{"name":"School of Medicine, University of Minho, Braga, 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