P09.02: Typical and atypical dural sinus malformation imaging in the fetus: based on 4 cases

Abstract

To describe the atypical imaging characteristic of dural sinus malformation in fetuses by ultrasound and MRI. We report a series of four fetuses with dural sinus malformation in Hubei Maternal and children's hospital from July, 2013 to February 2016. All the mothers undertook the prenatal MR imaging because of the intracranial space occupying lesions discovered by prenatal ultrasound. In all four cases, two of them represented the typical MR imaging of dural sinus ectasia with thrombosis in the vicinity of torcular Herophili (also known as sinus confluence), while in the other two cases lesions located mainly in superior sagittal sinus and transverse sinus separately. Two pregnancies were terminated, while the outcomes of other two cases were not available. Atypical location of the dural sinus malformation, such as superior sagittal sinus and transverse sinus, should be paid special attention to. Sonographer should realise the atypical sign of dural sinus malformation, and prenatal MRI is necessary to identify the lesion.