CNRI / SCIENCE PHOTO LIBRARY CNRI / SCIENCE PHOTO LIBRARY
Intestinal fistula. Close-up of a fistula in the colon (large intestine). A fistula is an abnormal passageway between the bowel and other structures. They are normally caused by injury or surgery but can be caused by an infection or inflammation and can occur in various parts of the body.
Model release not required. Property release not required.