Do you tend to get obsessed with diseases and conditions? This is one area of my obsessions.. diseases, conditions, disease processes, medical research, etc., especially just like that: if I hear of something new, I'll research it endlessly until I know everything about it from A-Z.
In fact, that's how I first found out about aspergers. I read the name of it in a book, didn't know what it was, and couldn't read another word of the book until I stopped and researched it endlessly..
When I was a kid, I used to read my parents' medical books. Not so much anymore though, unless there's something specific I want to look up.