Pantopaque pulmonary embolus is an unusual complication of myelography. Review of the literature revealed 4 cases of venous intravasation during this procedure (1–4), with evidence of pulmonary embolization in only 2 of them (3, 4). We are presenting here an additional case of venous intravasation of Pantopaque during myelography, with demonstration of the opaque medium in both lungs. B. G., a 32-year-old white female, was admitted to the University of California Hospital on May 22, 1955, complaining of pain in the left shoulder of two years duration. There was no history of trauma to this area. For the past year, there had been radiation of pain down the left arm, with paresthesia in the ulnar distribution. Three months prior to admission, dysphagia of a progressive nature developed. The only abnormal physical findings were an area of tenderness to deep palpation in the left posterior cervical triangle, adiadokokinesis of the left hand, weakness of the left triceps and wrist extensors, possibly due to pa...