Fig. 2From: Estrogen receptor α as a predictive biomarker for survival in human papillomavirus-positive oropharyngeal squamous cell carcinomaERα expression in adjacent normal tissue (×400 magnification). ERα was expressed in patches in the basal layer of the non-neoplastic squamous epithelium around the tumor, even in HPV− OPSCC (a). ERα expression was not observed in stromal cell nucleus and was weak in lymphocyte cytoplasm (b)Back to article page