Antineutrophil cytoplasmic antibody associated with pulmonary hemorrhage: Wegener's granulomatosis?

Antineutrophil cytoplasmic antibodies have been described mainly in patients with Wegener's granulomatosis. It has proven useful for both diagnosis and follow-up in these patients. We have described a patient with diffuse pulmonary hemorrhage in whom the suspicion of Wegener's granulomatosis was raised by the identification of antineutrophil cytoplasmic antibodies.