The mylohyoid is a muscular diaphragm in the floor of the oral cavity. Its
superficial and deep surfaces have important anatomical relationships. The
submandibular gland is uniquely related to both surfaces at the posterior f
ree edge of the muslce. It is here that the submandibular and sublingual ti
ssue spaces become continuous. This case report describes an unusual range
of anatomical variations of the mylohyoid muscle and reviews their clinical
significance. (C) 2001 Wiley-Liss, Inc.