Lateral C1-C2 puncture: a technique to reduce adverse reactions in metrizamide sellar cisternography.

Fifteen metrizamide sellar cisternograms performed with lateral C1-C2 puncture are presented. The technique is explained and adverse reactions are compared with those reported in cisternograms performed with lumbar injection. Attention is drawn to the simplicity of the method, the small amount of contrast medium required and the few and mild adverse reactions.