Pathology Delafield and Prudden. 



Plate IX. 



Tuberculous Bronchiectatic Cavities in Pulmonary 

 Tuberculosis. 



The advancing tuberculous involvement of the walls of the larger 

 bronchi in the upper lobe is associated with ulceration, so that the bron- 

 chiectatic cavities gradually become larger. In the upper portion of the 

 upper lobe there is diffuse consolidation with caseation: the lower 

 portion of the lobe shows miliary tubercles and partial consolidation of 

 the lung about them by exudate. 



The lower lobe is free save for a few scattered tubercles. The 

 blood-vessels are injected with blue so that the uninvolved portions of 

 the lung are dark. 



