Fig. 4From: p63+Krt5+ basal cells are increased in the squamous metaplastic epithelium of patients with radiation-induced chronic Rhinosinusitisa. The ratio of p63+ cells to Krt5+ cells compared among the three groups. b. The ratio of p63+ cells to Krt5+ cells compared between SM cases and non-SM cases in CRSr group. c. SM patterns based on the ratio of p63+ cells to Krt5+ cells: (1) Pattern A, the ratio ≥ 80%; (2) Pattern B, the ratio < 80% and ≥ 40%; (3) Pattern C, the ratio < 40%; and (4) Pattern D, both p63+ and Krt5+ cells are absent in nasal epithelium. Negative control staining was performed using secondary antibody onlyBack to article page