Updated results of 100 patients on clinical features and therapeutic options in necrobiosis lipoidica in a retrospective multicentre study

Background Necrobiosis lipoidica (NL) is a rare granulomatous disorder of unknown aetiology which can manifest in ulcerative skin lesions and is widely recognised in association with diabetes. We evaluated in total 100 patients to improve knowledge about the epidemiology and clinical course of NL. Additionally we focused on treatment options according to evidence level and expert opinion.