• Alex O Start, Gillian A Ryan, Barbra Cathcart, Jennifer Geraghty, Niamh Adams, Gabrielle Colleran, Claudine Vavasseur, John Caird, Dylan Murray, and Jennifer M Walsh.
• Fetal Medicine, National Maternity Hospital, Holles Street, Dublin 2, Ireland. Alexostart@gmail.com.
• Ir J Med Sci. 2023 Dec 1; 192 (6): 288128852881-2885.

AbstractWe present the case of a pregnant 32-year-old woman who presented with a giant fetal facial tumour at 22 weeks. The mass, initially 4 × 3.5 × 3 cm in size, was largely cystic with a small solid component. It subsequently increased to 9 × 9 × 10 cm. Significant compression effects on the fetal orbit, temple and infratemporal fossa, with potential compression of the optic nerve, were noted on ultrasound and MRI. The cyst required drainage twice in the pregnancy: firstly to reduce the compression effects and secondly to facilitate caesarean delivery. Postnatally, the baby had significant compression and displacement of the craniofacial skeleton from the mass effect. Postnatal histology revealed a diagnosis of a teratoma. This case highlights the complexities and challenges surrounding the diagnosis and management of a giant fetal facial tumour.© 2023. The Author(s).

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