Figure 1
Calvarial venous malformation of the right frontal bone.
A: Ultrasound image showing hypoechoic thickening of the right frontal calvarium with irregular cortical surface (yellow arrowheads).
B, C: Ultrasound during compression (B) and decompression (C) demonstrating compressible cavities (yellow arrowheads).
D: CT image showing an expansile osteolytic lesion of the right frontal bone with radiating trabeculae, creating a sunburst/honeycomb appearance.
E, F: Color Doppler ultrasound during compression (E) and decompression (F) demonstrating a flow–reflux phenomenon with inversion of flow color during ther maneuver (arrowheads).