A new relative contraindication for lumbar myelography.

We have taken myelograms of six patients with grave post-tuberculous thoracic gibbus of the spine and gross deformity of the thoracic cage. Two of these patients suffered violent convulsions and fracture of the neck of the femur. In one patient the myelogram was taken with Conray Meglumine and in another with Dimer X. We suggest that a grave deformity of the thoracic cage is a relative contraindication for lumbar myelography with these water-soluble contrast media. We assume that the reduced tissue oxygenation in these patients results in a lower threshold for convulsions.