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A Large Fetal Venous Malformation

Joana Pereira-Nunes, José Fontoura-Matias, Leonor Carmo, Carla Ramalho, Ana Vilan.

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A 28-year-old woman was referred to our institution at 35 weeks after an ultrasound diagnosis of an oral fetal lesion. Magnetic resonance showed a mass originating from the anterior part of the tongue with some areas of internal heterogeneity, possibly representing vascular structures. The multidisciplinary team decided to perform a cesarean delivery at 38 weeks. A large, well-defined bluish/purple exophytic mass arising from the apex of the tongue was confirmed right after birth, and a vascular anomaly was suspected. Precocious complete surgical excision and oral motor rehabilitation and feeding were performed. According to the 2018 International Society for the Study of Vascular Anomalies Classification (ISSVA), histological analysis confirmed a venous vascular malformation. Although rare, venous malformations represent the most common type of congenital vascular malformation. They are considered simple and slow-flow vascular malformations. Airway compromise may be a major concern when aerodigestive system involvement is present. Anatomic deformities and their functional and psychosocial impact are also important concerns. Herein, prompt recognition of an oral fetal mass allowed cautious delivery and postnatal management. It highlights the importance of careful prenatal diagnosis in managing potentially life-threatening congenital malformations.

Key words: Oral Mass, Partial glossectomy, Prenatal diagnosis, Vascular anomaly, Venous vascular malformation

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