Three cases of granulomatous arachnoiditis after myelography

Arachnoiditis occurring after myelography is well recognized and the mechanism is understood. Three cases of arachnoiditis caused by oily myelographic contrast media are presented. This complication of myelography may occur even if recognized precautions are observed. The general problem of encystment of dye with a chronic inflammatory process, fibrosis and granuloma formation is described.