Fig. 3
![Fig. 3](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs12301-020-00050-9/MediaObjects/12301_2020_50_Fig3_HTML.jpg)
Positive dark brown fibers of elastic tissue in eosinophilic background of fibrocollagenous bundles “×200-van gieson stain”; C collagen, E elastin
Positive dark brown fibers of elastic tissue in eosinophilic background of fibrocollagenous bundles “×200-van gieson stain”; C collagen, E elastin