Revisiting a historical phenomenon: Myodil droplets in the subarachnoid space

Myodil (iodophenylundecylic acid, a fatty acid) is an oil-based positive contrast media that has been widely used in myelography, ventriculography, and cisternography. [1] However, the use of oil-based contrast agents has been stopped long ago because of the potentially severe complications arising from their usage, including arachnoiditis and anaphylaxis. Thus, images of remnant material of intradural oil-based contrast are rarely encountered nowadays. We present a patient in whom incidentally detected myodil remnants were seen on computed tomography (CT). Additionally, we obtained and present the follow-up CT and magnetic resonance images (MRI) of this patient.