Wegener Granulomatosis Revealed by Pleural Effusion

Figure 2

At histological examination, the pulmonary nodule was centered by an area of necrosis, surrounded by a palissade of histiocytes, sometimes giant and multinucleated. Elastic stain enlightens the elastic lamnia, partially destroyed by this granulomatous inflammation (Elastic Stain, original magnification $\times 200$).