Accessory Salivary Tissue in the Mylohyoid Boutonnière: A Clinical and Radiologic Pseudolesion of the Oral Cavity

 Postcontrast axial CT images through the oral cavity showing multiple mylohyoid muscle defects. Image A is cranial to image B. On the patients left side, there are two mylohyoid muscle defects. On the right, there is one defect. Accessory salivary tissue is identified bilaterally (large arrows). Note that the accessory salivary tissue has the same attenuation as that of the normal submandibular glands (*).A, large arrow, accessory salivary tissue; small arrows, fat-containing defects. B, large arrows, accessory salivary tissue; small arrow, fat-containing defect (18).