Cervical Thorotrast granuloma: an iatrogenic cause of dysphagia.

Thorotrast granuloma of the neck is an extensive benign connective tissue overgrowth secondary to localized extravasation of contrast. This can present with dysphagia secondary to mass effect or motor disorder of swallowing related to demyelinization of the ninth through twelfth cranial nerves. The radiographic appearance is characteristic in both location and density.