Fig. 3
From: Platelet-rich plasma (PRP) a biogenic stimulator in treatment of primary atrophic rhinitis
a Squamous cell metaplasia (arrow); H&E, original, magnification × 200. b Erosion of the respiratory epithelium with cilia and goblet cell loss (arrow); H&E, original, magnification × 200. c Granulation tissue with abundant inflammatory cells (arrow); H&E, original, magnification × 200. d Stromal fibrosis, thick-walled vascular structures with abundant hemorrhage, and end arteritis obliterans (arrow); H&E, original, magnification × 200