Fig. 1From: Dysregulated PDGFR alpha expression and novel somatic mutations in colorectal cancer: association to RAS wild type status and tumor sizePDGFRα immunohistochemical expression pattern. a Weak staining of PDGFRα in normal colon epithelium. b Strong staining of PDGFRα in wild type RAS adenocarcinoma. c Weak staining of PDGFRα in mutated RAS adenocarcinoma. d Diffuse immunostaining in stromal cells (a–c magnification × 200; d magnification × 400)Back to article page