Figure Legends
Figure 1(A) Axial Non-Contrast CT examination of the neck at the level of the
larynx demonstrates a well-defined polypoid soft tissue mass arising
from the anterior commissure. Axial (B) and sagittal (C)
contrast-enhanced CT examination of the neck demonstrate partial
enhancement. . Intraoperative direct laryngoscopy (D) showing the 1.5cm
mass attached to the anterior commissure.
Figure 2 (A) Exophytic proliferation of spindle cells in a loose myxoid
background (H&E, 40 X). (B) Spindle cells admixed with chronic
inflammatory cells in a myxoid background (H&E, 200X). (C) Tumor cells
have low nuclear cytoplasmic ratios, hypochromatic nuclei with open
chromatin and prominent nucleoli. Mitotic figures are present (H&E,
400X). (D) Tumor cells show positive staining for ALK-1 by
immunohistochemistry (ALK-1, 200X).