Fig. 2From: Ascending aortic aneurysm caused by Mycobacterium tuberculosis Photomicrograph of excised specimen of aortic wall. Foci of histiocyte collection, some admixed plasma cells and caseous necrosis (large black arrow). Langerhans type giant cells are also seen (small black arrow). (Hematoxylin and eosin stain, ×400)Back to article page