Myelitis. "myelitis" is inflammation of the spinal cord, one type being transverse myelitis where several spinal cord segments are involved by viruses/lupus/etc. "polycystic" refers to multiple cysts in a structure. My research revealed no reference to polycystic myelitis. There is transverse myelitis; there are polycystic ovaries & kidneys. Please provide more info. Where did you learn this term?
??? Please check the name of the condition. Myelitis is an inflammation of the spinal cord. Polycystic means many cysts, and could be related to kidney or ovary. I'm not aware of any conditions called polycystic myelitis.