Residual myelographic contrast material seen on the chest radiograph.
Oily contrast material remaining after myelography may escape through the lumbar needle track and enter the dependent thoracic extradural spaces as droplets and collections in the intercostal spaces. Until these intercostal collections are absorbed, which takes place slowly over a period of one or more years, they can produce densities on the chest radiograph. The authors report 26 such cases representing three different patterns of distribution.
D000042:Absorption; D000328:Adult; D000368:Aged; D003951:Diagnostic Errors; D005119:Extravasation of Diagnostic and Therapeutic Materials / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009192:Myelography; D013896:Thoracic Diseases / Q000000981:diagnostic imaging*; D013997:Time Factors