Fig. 2
From: Prognostic significance of expression of cysteine-rich 61 and cyclooxygenase-2 in gastric cancer
COX-2 expression levels in gastric cancer group and non-tumor gastric mucosa group. Positive staining was mainly located in the cytoplasm of tumor cells. a. negative expression in non-tumor mucosa; b. positive expression in well-differentiated gastric cancer; c. positive expression in moderately differentiated gastric cancer; d. strong positive expression in poorly differentiated gastric cancer