The value and limitations of myelography for the diagnosis of intraspinal lesions are becoming well recognized. Pantopaque (6, 10) as a contrast medium was first introduced into the Army hospitals in 1942 by Spurling (9). Constant search is being maintained for a contrast medium that is innocuous, absorbable, and capable of being easily removed, so that no foreign body material may remain within the spinal canal. These demands seem to be best met at present by pantopaque. The indications for the employment of such an oil depend on the diagnostic problems at hand. Obviously its indiscriminate use is to be discouraged when an accurate diagnosis can be reached clinically. However, to have available a substance that is safe and that can aid in the determination and more accurate localization of a suspected intraspinal lesion is of definite advantage.