Fig. 4From: IgG4-related disease with tracheobronchial miliary nodules and asthma: a case report and review of the literatureTracheal mucosa pathology (first time). Infiltration of IgG4+ plasma cells, the ratio of IgG4+/IgG+ cells> 40%, and IgG4+ plasma cells> 10/HPF, figures are as follows separately (from left to right):HE stain magnification 4 times; IgG stain magnification 10 times; IgG4 stain magnification 10Back to article page