Fig. 6

Immunohistochemical staining. (A) Desmin marker staining was positive only for smooth muscle fibers of the esophageal wall (red arrow), fibrous proliferative stromal area with inflammation was completely negative (blue arrow) (original magnification x 100). (B) An increase in the number of IgG4-positive plasma cells with the number about 120 IgG4(+) plasma cells /high power field (original magnification x 400). (C) The rhabdoid fibroblasts are negative for ALK1. (D) The rhabdoid fibroblasts are negative for CD34