I'm a pathologist and have performed over 500 autopsies. AMA.
This AMA is in response to this request: http://redd.it/ozcg1. I'm a pathologist working in a autopsy service in Brazil. I also work in a hospital analysing biopsy material. Besides autopsy, I have experience with cancer/tumors. So ask away!
Edit: I'd just like to thank everyone who participated. I had a great time, thank you all. If you have more questions, feel free to ask here or PM me, I'll try to answer them all.