[Vasculitic skin lesions caused by nonsteroidal anti-inflammatory agents]. / Vaskulitische Hautläsionen bedingt durch nicht-steroidale Antiphlogistika.

Today, non-steroidal anti-inflammatory drugs are very frequently prescribed agents. These drugs are responsible for side effects which are rarely recognized and poorly understood. One of these side effects is leukocytoclastic vasculitis with or without skin ulcerations. Rheumatoid arthritis and other mixed connective tissue diseases may also lead to vasculitis ulcerations, which explains the difficulty of correct diagnosis in each case. In addition, disease-modifying drugs such as methotrexate, frequently used in the above-mentioned syndromes, further complicate the situation because these agents may also produce vasculitis. In the present case study we analyze and discuss the diagnosis and follow-up in three of our patients with vasculitis skin ulcerations. In two of them, the vasculitis was attributed to the use of naproxen. Despite thorough examination and documentation of all three cases, etiologic evaluation was difficult and complex.