Figure 1.
The transcervical ultrasound appearance of the normal BOT is shown in parasagittal (A) and coronal views (B).
A BOT tumor is shown in parasagittal (C) and coronal views (D). A large endophytic portion as well as a superficial mucosal component are observed in both views. On coronal view, the relationship with midline is appreciated. The distance between each calibration bar is 10 mm.
Table 1.
Ultrasonographic characteristics of base of tongue lesions.
Figure 2.
Comparison of fiberoptic BOT examination and ultrasound.
Panel A shows the fiberoptic image of a BOT lesion which appears exophytic and ulcerative. On ultrasound parasagittal view (B), a large endophytic portion which is hypoechoic relative to the remainder of the tongue is revealed (marked by x’s) in addition to the known exophytic portion. Panel C shows fiberoptic image of a BOT with asymmetry and obvious bulge which is consistent with a clinically exophytic tumor. On ultrasound (panel D) an endophytic component is appreciable and is 7 mm from the geniohyoid muscle (). The distance between each calibration bar is 10 mm.
Table 2.
Clinical and ultrasound characteristics of base of tongue lesions.