Hello @ersingh, I wasn't familiar with the condition either but did a search of Connect and found quite a few members who have mentioned it. You might want to scan through their comments and read what they have shared. Here's a link that lists the comments - https://connect.mayoclinic.org/search/comments/?search=%20paraneoplastic%20diseases.

Mayo Clinic has some information that might help explain better here:
-- Paraneoplastic syndromes of the nervous system: https://www.mayoclinic.org/diseases-conditions/paraneoplastic-syndromes/symptoms-causes/syc-20355687