Figure 23a.  Dermoid cyst in a 35-year-old woman with a 1-week history of neck swelling. (a) Axial contrast-enhanced CT scan shows a well-defined mass in the submandibular-submental region with multiple discrete foci of hypoattenuation in the nondependent portion of the cyst. (b) Coronal CT scan shows the mass inferior to the mylohyoid muscle (arrowheads). (c) Photograph of the opened cyst shows multiple spherical masses floating in fluid contents. Scale is in centimeters.