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FIG 1. Technique of volume contouring.
A, Axial enhanced CT scan obtained at the level of the cricoarytenoid joint shows a true vocal cord carcinoma on the left. A white contour has been drawn around the tumor.
B, Axial CT scan obtained at the aryepiglottic fold shows transglottic spread of the tumor (white contour). This finding precludes voice-conservation laryngectomy (hemilaryngectomy).
C, Tumor (white contour) also extends inferior to the level of the subglottis, preventing partial laryngectomy (supracricoid laryngectomy). The only surgical alternative was total laryngectomy. Total tumor volume was 3.2 mL. The patient was treated with combined chemotherapy and RT.
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