Emphysema (close up view)

Emphysema (close up view) • View of pulmonary parenchyma showing numerous enlarged air spaces (white arrows) scattered throughout. • Yellow arrow points to calcified caseating lymph nodes associated with tuberculosis. • Air spaces are not uniformly enlarged; some parenchyma retains normal alveoli. • Characteristic for centriacinar emphysema. (Description By:Melinda Sanders, M.D. ) (Image Contrib. by: UCHC )