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A, Soft-tissue window axial contrast-enhanced CT through thyroid cartilage shows expansile lesion from left alar of thyroid cartilage. A, Soft-tissue window.

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Presentation on theme: "A, Soft-tissue window axial contrast-enhanced CT through thyroid cartilage shows expansile lesion from left alar of thyroid cartilage. A, Soft-tissue window."— Presentation transcript:

1 A, Soft-tissue window axial contrast-enhanced CT through thyroid cartilage shows expansile lesion from left alar of thyroid cartilage. A, Soft-tissue window axial contrast-enhanced CT through thyroid cartilage shows expansile lesion from left alar of thyroid cartilage. Multiple rings, calcification arcs, and relatively intact cortex suggest chondroid lesion. False cord is significantly displaced. Note large soft-tissue component extending anterolaterally into strap muscles and incomplete cortex at point (arrows). B, Bone window of expansile lesion shown in panel A. C, Bone window axial CT scan obtained through vocal cord level shows mass representing typical chondroid lesion with multiple rings and calcification arcs (arrow) and well-preserved cortex at this level. D, Histologic section from laryngectomy specimen shows features of dedifferentiated chondrosarcoma. Area of low-grade chondrosarcoma is on left, juxtaposed to malignant fibrous histiocytoma-like area of high-grade sarcoma on right (H&E, original magnification ×125). Osamu Sakai et al. AJNR Am J Neuroradiol 2000;21: ©2000 by American Society of Neuroradiology

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