Fig. 3From: Tracheo-innominate artery fistula with continuous bleeding successfully treated through the suprasternal approach: a case reportNeutrophilic infiltration and tracheal attachment to the adventitia in Case 2. Microscopic findings of the TIF (indicated by the black arrow) revealed intramural neutrophilic infiltration in the innominate artery and the attachment of tracheal tissue to adventitia. (stain, HE; magnification, × 10)Back to article page