DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Pyoderma ulcer. Dressing being applied to a pyoderma ulcer (black and yellow) on a 60-year-old man's shin. The black area is dead tissue. Pyoderma ulcers form in patients with the condition pyoderma gangrenosum. The ulcers most often form on the lower limbs, as here, and are thought to be due to problems with blood supply to the ulcerated area. The ulcer is shown in image M240/646.
Model release available. Property release not required.