I have been on medical leave since Jan 20, 2010. I have terrible headaches, bobbing head & tremors, with a slow gait and slurred speech. I have also been very dizzy and for the first 2 months vomited at least 6-8 times a day. I have lost 22 pounds. I have had an EEG, SSEP, 4 MRI's, 4 Lumbar spinal punctures and now a CAT scan. I also will be seeing a Neuro-physic this coming week for a complete test. Most of my tests have come back within range. The CAT scan however shows there R 2 small sub 5 mm subpleural nodes in the right lobe most consistent with subpleural lymph nodes.The liver is diffusely hypoattenuating relative to the spleen consistent with hepatic strstosis. There is also a 1.1 cm simple cyst in the lower pole of the right kidney. Can you please explain what this means? Thank you for your help.