Histologic picture of the resected aortic wall - After formalin-fixation and paraffin embedding a 2 μm transversal full section of the ectatic aortal segment was stained with H&E according to a standard protocol. A dense and focally destructive inflammatory reaction that covered 75% of the wall thickness and predominated the media was observed. Specifically, focal necroses with neutrophilic granulocytes (asteriks, lower left) and bands of lymphocytic infiltrates with occasional multinuclear giant cells (arrow) could be identified. Magn.: 200 ×.