characteristic of part of inheres in part of Abnormality of the skin zone of skin pyoderma gangrenosum true MedDRA:10037635 ICD10:L88 SNOMEDCT:74578003 ICD9:686.01 DOID:8553 MedDRA:10084537 An idiopathic, rapidly evolving, and severely debilitating disease occurring most commonly in association with chronic ulcerative colitis. It is characterized by the presence of boggy, purplish ulcers with undermined borders, appearing mostly on the legs. The majority of cases are in people between 40 and 60 years old. Its etiology is unknown. Dani Welter MESH:D017511