[A case of early recognized Wegener's granulomatosis with renal involvement. Insights for early diagnosis].

Systemic necrotic and granulomatous vasculitis presents with vascular involvement in almost every organ, manifesting with stenosis, ischemia, infarction, or hemorrhage. The clinical picture depends on the kind and size of the involved vessels and on the activity of the inflammatory process. Wegener's granulomatosis is a necrotic, granulomatous inflammation of small vessels of the upper and lower airways and kidneys. We present the case of a 25-year-old male in whom the definitive diagnosis of Wegener's granulomatosis was achieved within five weeks from onset. Among the first symptoms were microinfarcts localized in the fingertips and the nail matrix; their nature was investigated with capillaroscopy.