IODIZED OIL MYELOGRAPHY

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Abstract
Roentgen examination after the injection of iodized oil into the spinal subarachnoid spaces (iodized oil myelography) is the most important step in the diagnosis of rupture of the intervertebral disk into the spinal canal. The accurate roentgen localization of the lesion is of distinct value to the surgeon, and the demonstration of the mechanism by which the fragment of the ruptured disk presses on the cauda equina has added weight to the evidence that rupture of an intervertebral disk into the spinal canal is a definite clinical entity. A positive diagnosis of posterior protrusion of an intervertebral disk into the spinal canal has been made at the Massachusetts General Hospital in 133 cases by the use of iodized oil, roentgenoscopy and instantaneous films taken during roentgenoscopic examination.1All except 9 of these diagnoses were proved correct at operation. There were 2 cases of negative results on roentgen examination with

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