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Hypoechoic lesion superficial to the right parietal bone near midline. This lesion communicates with the superior sagittal sinus via a 1 mm defect in the parietal bone. Doppler images show flow from the superior sagittal sinus, through the osseous defect, and into the extracranial lesion. Spectral analysis of flow within the lesion has a venous characterization.