Figure 6 :(a) Right bronchial branches at the lung hilum and (b) intraparenchymal airways are filled with blood clots. (c) Bronchial lumen filled with hemorrhage (H and E, ×100). (d) Destruction of the elastic pulmonary artery by tumor that would have produced the bronchoarterial fistula (Elastic van Gieson, ×100)