From time to time I get e-mails with iphone pictures of imaging studies to give second opinions on.
This one was particularly interesting so I thought I'd share. 45 yo man with 4 months of progressive weakness. Now with inability to move extremities, and a sensory level near the shoulders.
MRI as shown below (note these are phone camera captures from a lightbox, don't judge).
Post your answer in the comments, I will post the answer in the comments in a few days.