Key result
Perivascular thorium dioxide in the neck causes latent effects like vocal cord paralysis, requiring evaluation with plain films and computed tomography to assess carotid artery involvement.
Plain films and CT imaging are useful for evaluating the late effects of perivascular thorium dioxide in the neck, particularly to assess carotid artery involvement.
May prompt targeted imaging in rare historical exposures; leaves open prospective studies on surveillance protocols.
The late effects of thorium dioxide (Thorotrast) in the perivascular space of the neck are reviewed. The roentgenographic analysis of the problem consists of both plain films (to detect the residual density of extravasated thorium dioxide) and computed tomography (to help define any involvement of the carotid artery).
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DeLuca et al. (1984) studied this question. Perivascular thorium dioxide in the neck causes latent effects like vocal cord paralysis, requiring evaluation with plain films and computed tomography to assess carotid artery involvement.
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