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  • Title: Is bridging vein rupture/thrombosis associated with subdural hematoma at birth?
    Author: Bartoli M, Mannes I, Aikem N, Rambaud C, de Boissieu P, Adamsbaum C.
    Journal: Pediatr Radiol; 2022 May; 52(5):932-940. PubMed ID: 34988598.
    Abstract:
    BACKGROUND: The combination of bridging vein rupture/thrombosis and subdural hematoma in infants has recently gained attention as highly suggestive of abusive head trauma. While subdural hematomas are frequently observed at birth, there are no previous studies of bridging vein rupture/thrombosis prevalence in that context. OBJECTIVE: To evaluate the prevalence of bridging vein rupture/thrombosis in newborns with and without subdural hematoma. MATERIALS AND METHODS: This bicentric retrospective study (2012-2019) looked at all brain MRIs performed in neonates. We noted delivery method, demographic data and intracranial injuries and analyzed any clots at the vertex as potential markers of bridging vein rupture/thrombosis. RESULTS: We analyzed 412 MRIs in 412 neonates. Age was (mean ± standard deviation [SD]) 5.4±2.2 days and 312 (76%) infants were full term (38.3±2.9 weeks from last menstrual period). The delivery method was vaginal birth for 42% (n=174), cesarean section for 43% (n=179), and unknown for 14% (n=59). Subdural hematoma was present in 281 MRIs (68.0%, [95% confidence interval = 63.3-72.5]). Six MRIs showed at least one clot at the vertex, assumed to be possible bridging vein rupture/thrombosis (1.5%, [0.5-3.1%]). Only one MRI showed more than two clots at the vertex, in a context of maternal infection. There was no significant difference in terms of gestational age at birth, delivery method or the presence of subdural hematoma or parenchymal injuries between those 6 infants and the 406 others. CONCLUSION: Bridging vein rupture/thrombosis at birth is very rare and unlikely to be related to subdural hematoma.
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