Figure 1
From: Epidermal Growth Factor Receptor and K-RAS status in two cohorts of squamous cell carcinomas
EGFR immunostaining. Anal canal squamous cell carcinoma, A to D. A. Weak immunostaining magnification x 100; B. Weak immunostaining magnification x 200; C. Strong immunostaining magnification x 100; D. Strong immunostaining magnification x 200. Tonsil squamous cell carcinoma, E and F. E. Immunostaining magnification x 100; F. Immunostaining magnification x 400. Arrows indicate membrane staining. For A, C and E, bar indicates 200 µm; B and D, 100 µm; and F 50 µm