Fig. 4
From: Immunohistology and remodeling in fatal pediatric and adolescent asthma
a Thickness of ASM in a small airway (brown), in a 19.5 year old fatal asthma case (mean ASM% 14%) is similar to (b) that in a 14.9 year old control (mean ASM% 14%) (smooth muscle actin; bars 50 um). c Large airway (bronchial) lumen in a 2.4 year old fatal asthma case filled with mucous (Alcian Blue-Periodic Acid-Schiff; bar 250 um). d Small airway (bronchiolar) lumen filled with mucous (blue) in a 18.7 year old fatal asthma case (Alcian Blue-Periodic Acid-Schiff; bar 50 um)