Dear michaelg, im so sorry that you, i & everyone has pantopaque, myodil in their spine too, especially the ones with aa. Im having what i would say the worst attacks of pure arach pain as it is so localized, so very severe it breaks through fentanyl & morphine like im taking water. An animal is chewing, gnawing on my spinal cord at L4-5, or it feels like it! I had csf leaks, esi's tntc, 4 surgeries, so i will never know exactly which source & it doesnt matter. Looking ahead i have to find the next step. Ketamine injections, scs put in peripherally so as not to disturb balance of sp nerves, pump but No. No dr in Tx i can find that knows about arach other than i have it on mri. Ive had it 24 years but found out last fall. Ketamine $5000 a 4 hr treatment.What about you?Im so glad that you posted!