Fig. 1.

Physical examination and computed tomography findings. a A light bluish, solid neoplastic lesion measuring 3 cm in size was palpated in the left floor of the mouth, and the covered mucosa had no ulcers (arrow). b A computed tomography scan of the head and neck shows a well-defined, solid, heterogeneous enhanced nodule in the left floor of the mouth. There was no obvious infiltration in the surrounding soft tissue, and the lingual cortical bone of mandible was not involved (arrow). c A three-dimensional image showing the lesion was located lateral to the hyoid bone and adjacent to the left sublingual fossa of the mandible with abundant blood flow (arrow)