Intracranial iodinated contrast medium deposits 50 years following a previous myelography: A case report and literature review.

Before the advent of CT and MRI, and since the early 1920s, myelography has been used for the diagnosis of spinal cord lesions and lumbar disc herniations. We report a case of an 86-year-old man with a migration of lipiodol in the intracranial subarachnoid spaces. The patient had undergone a myelography in the early 1970s, 50 years earlier. Lipiodol, an iodized oil, was widely used as a contrast agent in conventional myelography for years and provided excellent radiographic visualization of the subarachnoid spaces. Although rare, images of its residues may still be encountered in modern radiographic imaging. Neurosurgeons and radiologists should be aware of this imaging appearance, and be able to differentiate it from possible pathologies.