Fig. 2
From: Immunohistology and remodeling in fatal pediatric and adolescent asthma
a Bronchial thickness of reticular basement membrane (RBM) (red) is increased in a 2.6 year old fatal asthma case (mean 6.9 um) whereas (b) the thickness of RBM is normal in a 2.5 year old control (mean 1.7 um) (hematoxylin-eosin stain; bars 50 um). c Increased ASM (brown) in a large airway in 19.5 year old fatal asthma case (mean ASM% 28%) compared with (d) that in a 6.0 year old fatal asthma (mean ASM% 12%) (smooth muscle actin stain; bars 250 um)