Fig. 4
![Fig. 4](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs12917-018-1533-x/MediaObjects/12917_2018_1533_Fig4_HTML.png)
a Infiltration of few macrophages at the perivascular area and the submucosa of urethra. H&E, × 100. b Positive light golden brown immunoperoxidase staining observed in the cytoplasm of the macrophages and epithelial cells of the urethra. IP, × 100