I recently experienced partial loss of vision in one eye (it came back) but I was put in the hospital and they ran all sorts of tests. One was called a paraneoplastic test and the calcium channel N type antibody came back positive. Now my doctor wants to look for small cell lung cancer and I'm scared. They are looking in my brain too. Has anybody here heard of this? I don't know what to expect. Does this mean I more than likely have lung cancer? Thanks!!