Perianal Fistulas 

Aman Khurana, MD, presents his lecture on Perianal Fistulas. This lecture is reposted with permission for the RSNA Case collection.
Case of the week provides short summary of most interesting cases available in the RSNA Case Collection.
Visit the RSNA Case Collection to test your knowledge.
Link to RSNA case Collection: cases.rsna.org.