Fig. 2

COX-2 expression level in pituitary adenomas. The expression level of COX-2 was evaluated in tumor and normal tissues of pituitary with different adenoma types. The COX-2 expression level was increased in pituitary adenoma (a), non-functional pituitary adenoma (b), functional pituitary adenoma subtypes (c), macroadenoma (d) and invasive (e) tumor tissues. The Statistical differences between groups is shown as asterisk (* = P < 0.05, ** = P < 0.01,*** = P < 0.001)