CTICasesVocal Cord Paralysis Secondary to Recurrent Laryngeal Nerve Compression by Lung Cancer
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Imaging findings
CT of the neck and upper chest in a patient with left upper lobe lung cancer and ipsilateral mediastinal adenopathy reveals diagnostic signs of left vocal cord paralysis. These include dilatation of the left piriform sinus, thickening of the left aryepiglottic fold, dilation of the laryngeal ventricle, and medial displacement of the posterior vocal cord.
Key takeaways
Compression or invasion of the left recurrent laryngeal nerve by a left-sided lung cancer or mediastinal adenopathy results in vocal cord paralysis. Radiologists should recognize the secondary signs of vocal cord paralysis on chest and neck CT scans to help identify the site and cause of nerve injury.
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