Fig. 1

Appearance of ultrasound and magnetic resonance imaging. A Ultrasonography showed a multilocular cystic mass with solid components (arrows). The solid area revealed internal heterogeneity. The tumor showed clear demarcation. B, C. T2-weighted images (T2WI) via magnetic resonance imaging examination revealed a multilocular cystic mass. Each cyst showed different degrees of intensities, suggesting different concentrations of protein or blood. The solid component was observed as a low-intensity area (B [sagittal imaging], C [axial imaging], arrow). D Diffusion-weighted imaging shows no significant decreasing apparent diffusion coefficient value in the solid area of the tumor (arrow)