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AJNR - American Journal of Neuroradiology

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American Journal of Neuroradiology 26:1339-1341, June-July 2005
© 2005 American Society of Neuroradiology

Case Report
HEAD AND NECK

Bilateral Dystrophic Ossification of the Thyroid Cartilage Appearing as Symmetrical Laryngeal Masses

J. Galline^a, K. Marsot-Dupuch^a, P. Bigel^b and P. Lasjaunias^a

^a Department of Neuroradiology, Hôpital du Kremlin-Bicêtre, Le Kremlin-Bicêtre, France
^b Department of Anatomopathology, Hôpital Saint-Antoine, Paris, France

Address correspondence and reprint requests to Kathlyn Marsot-Dupuch, MD, Department of Neuroradiology, Centre hospitalier universitaire de Bicêtre, 78, rue du Général Leclerc, 94275 Le Kremlin-Bicêtre Cedex, France

Summary: Primary cartilaginous lesions of the larynx are relatively uncommon. We present a case of bilaterally pseudocystic lesion of the thyroid cartilage that demonstrated progressive calcification. Pathologic analysis showed features suggesting a dystrophic lesion with no evidence of malignancy. We hypothesize that repetitive microtrauma related to muscular overuse probably led to inflammatory changes at tendinous insertions on the laryngeal cartilage and resulted in dystrophic ossification of the laryngeal cartilage.