Fig. 1
From: IL-5 and IL-6 are increased in the frontal recess of eosinophilic chronic rhinosinusitis patients
Histopathological features and cytokine expression in the frontal recess of ECRS and non-ECRS patients. Histopathological findings of frontal recess mucosa from non-ECRS patients (a, c and e) and ECRS patients (b, d and f). Hematoxylin-eosin staining (a and b), and immunohistochemistry (c and d show IL-5 positive cells, E and F show IL-6 positive cells) of patient samples. Arrow heads point to positive cells. Scale bars: 20 μm. Magnification: ×400