Pyoderma gangraenosum
Definition Pyoderma gangränosum (also called Dermatitis ulcerosa) is an often very painful inflammatory disease of the skin. It often occurs in connection with autoimmune diseases. A typical site of skin affection is the front edges of the shin bone. It usually begins with skin changes that can be raised (papules) and also with blisters, which … Pyoderma gangraenosum