Preoperative imaging by CT and MRI. (a) Computed tomography of his neck. A gourd-shaped distension of bone was present on the right side of his hyoid bone. A multilocular cystic area of low density was observed in the distention. Central ossification was evident in the anterior lesion. (b) Magnetic resonance imaging T1-weighted image with low signal intensity. (c) MRI T2-weighted image high signal intensity. A mosaic pattern was visible in the high signal area.