Iofendylate

Iophendylate (generic name is iodophenylundecylic acid) and sold under the tradename Myodil (except the USA where it was marketed as Pantopaque) was an oil-based contrast medium that was previously used for myelography. It was first used in 1944, but officially discontinued in 1988 .

The iodine moiety of the compound causes high attenuation on radiography and CT . Its major drawback was its extremely slow resorption, with contrast medium persisting in situ for decades . Complete removal through aspiration was usually impossible after a procedure, and the remaining droplets could lead to chronic irritation and severe arachnoiditis.

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